UCB1400BE Philips Semiconductors, UCB1400BE Datasheet
UCB1400BE
Available stocks
Related parts for UCB1400BE
UCB1400BE Summary of contents
Page 1
UCB1400 Audio codec with touch screen controller and power management monitor Rev. 02 — 21 June 2002 1. General description The UCB1400 is a stereo audio codec equipped with touch screen and power management interfaces. It integrates an AC ’97 ...
Page 2
... Philips Semiconductors 4. Ordering information Table 1: Ordering information Type number Package Name Description UCB1400BE LQFP48 Plastic low profile quad flat package, 48 leads; body 7 5. Block diagram TSPX TSMX TSPY TSMY ADCSYNC XTL_IN XTL_OUT IO[9:0] Fig 1. Block diagram. 9397 750 09611 Product data ...
Page 3
... Philips Semiconductors 6. Pinning information 6.1 Pinning Fig 2. Pin configuration (LQFP48). 6.2 Pin description Table 2: Total pin count = 48 Symbol AC-link, crystal and interrupt interface (pin count = 8) XTL_IN XTL_OUT RESET SYNC BIT_CLK SDATA_OUT SDATA_IN IRQOUT 9397 750 09611 Product data Audio codec with touch screen controller ...
Page 4
... Philips Semiconductors Table 2: Total pin count = 48 Symbol Audio interface (pin count = 6) MICP MICGND LINE_IN_L LINE_IN_R LINE_OUT_L LINE_OUT_R ADC and touch screen interface (pin count = 9) AD[3:0] TSPX TSMX TSMY TSPY ADCSYNC GPIO interface (pin count = 10) IO[9:0] Power and miscellaneous (pin count = 15) DVDD2, DVDD1 DVSS2, DVSS1 7, 4 ...
Page 5
... Philips Semiconductors 7. Functional description 7.1 Functional block diagram LINE_OUT_L LINE_OUT_R LINE_IN_L MUX (0x1A) 0–22.5 dB MICP (0x0E) LINE_IN_R MICGND GROUND SWITCH (0x1A) XTL_IN OSCILLATOR / PLL XTL_OUT IO[9:0] TOUCH SCREEN BIASING MATRIX (0x64) BIAS CURRENT TSPX TSMX TSPY TSMY AD[3:0] ADCSYNC Fig 3. Functional block diagram. 9397 750 09611 Product data MASTER VOL ...
Page 6
... Philips Semiconductors 8. AC ’97 interface The UCB1400 implements an AC ’97 Revision 2.1 interface. Refer to the Audio Codec ’97 Component Specification Revision 2.1 from Intel. Fig 4. UCB1400 and AC ’97 controller connection diagram. 8.1 Clocking The UCB1400 functions only as a primary codec. As such, it derives its clock internally from an externally attached 24 ...
Page 7
... Philips Semiconductors 8.3 Digital interface 8.3.1 AC-link digital serial interface protocol The UCB1400 incorporates a 5-pin digital serial interface that links it to the AC ’97 Controller. AC-link is a bi-directional, fixed rate, serial PCM digital stream. It handles multiple input, and output audio and modem streams, as well as control register accesses employing a time division multiplexed (TDM) scheme ...
Page 8
... Philips Semiconductors 8.3.2 AC-link audio output frame (SDATA_OUT) The audio output frame data streams correspond to the multiplexed bundles of all digital output data targeting UCB1400’s DAC inputs, and control registers. Each audio output frame supports 20-bit outgoing data time slots. Slot special reserved time slot containing 16 bits which are used for AC-link protocol infrastructure ...
Page 9
... Philips Semiconductors Fig 7. Start of an audio output frame. SDAT_OUT’s composite stream is MSB justified (MSB first) with all non-valid slots’ bit positions stuffed with 0s by the AC ’97 Controller. If there are less than 20 valid bits within an assigned and valid time slot, the AC ’97 Controller always stuffs all trailing non-valid bit positions of the 20-bit slot with 0s ...
Page 10
... Philips Semiconductors Slot 2: Command data port: control register write data in the event that the current command port operation is a write cycle (as indicated by Slot 1, bit 19). • Bit(19:4) Control Register Write Data (stuffed with 0s if current operation is a read). • Bit(3:0) Reserved (stuffed with 0s) If the current command port operation is a read, then the entire slot time must be stuffed with 0s by the AC ’ ...
Page 11
... Philips Semiconductors TAG PHASE 81.4 ns SYNC (12.288 MHz) BIT_CLK slot(1) slot(2) SDATA_IN END OF PREVIOUS TIME SLOT “VALID” BITS AUDIO FRAME (“1” = TIME SLOT CONTAINS VALID PCM DATA) CODEC READY Fig 8. AC-link audio input frame. A new audio input frame begins with a LOW-to-HIGH transition of SYNC. SYNC is synchronous to the rising edge of BIT_CLK ...
Page 12
... Philips Semiconductors Slot 1: Status address port: functions including, but not limited to, codec settings and power management. Audio input frame slot 1’s stream echoes the control register index, for historical reference, for the data to be returned in slot 2. (Assuming that slots 1 and 2 had been tagged ‘ ...
Page 13
... Philips Semiconductors Table 3: Bit 19-4 3-1 0 Slots 5 through 11: UCB1400. 8.3.4 AC-link low power mode The AC-link signals can be placed in a low power mode. When the UCB1400’s PR4 bit is set to ‘1’ in the Power-down status and control register (0x26), both BIT_CLK and SDATA_IN will be brought to, and held at, a logic LOW voltage level. ...
Page 14
... Philips Semiconductors Waking up the AC-link: power, halted mode. Regardless of the method the AC ’97 Controller that performs the wake-up task. AC-link protocol provides for a ‘Cold AC ’97 Reset’, and a ‘Warm AC ’97 Reset’. The current power-down state would ultimately dictate which form of AC ’97 reset is appropriate. Unless a ‘ ...
Page 15
... Philips Semiconductors In order for the AC ’97 Digital Controller to access the UCB1400, the 2-bit Codec ID field (chip select) (LSBs of Output Slot 0) must be set to ‘0’ (see UCB1400 shall monitor the Frame Valid, Slot 1 Valid Command Address, Slot 2 Valid Command Data and Codec ID bits, and respond only if properly accessed by the AC ’ ...
Page 16
... Philips Semiconductors 8.5 Variable sample rate signaling protocol The AC-link is defined for a fixed transfer rate of 48 kHz. To support the diverse sample rates, UCB1400 implements the Variable Sample Rate Signaling Protocol of the AC ’97 Component Specification : • To control the AC ’97 Controller to input a rate other than 48 kHz, the UCB1400 uses the tag bit for slot 3 and 4 (PCM L & ...
Page 17
... Philips Semiconductors POWER-DOWN FRAME SYNC BIT_CLK slot 12 Write to TAG SDATA_OUT 0x26 prev. frame slot 12 TAG SDATA_IN prev. frame IRQOUT Fig 11. AC Link power-down/power-up sequence. Before enabling wake-up via IRQOUT or GIEN bit, the UCB1400 must be enabled for interrupt by setting the appropriate bits in the Positive INT Enable register (0x5E) and Negative INT Enable register (0x60) ...
Page 18
... Philips Semiconductors 8.8 General purpose IOs Fig 12. Block diagram of IO pin circuitry. The UCB1400 has 10 programmable digital input/output (I/O) pins. These pins can be independently programmed as input or output using the IOD[9:0] bits in the IO Direction Register (0x5C). The output data is determined by the content of the IO[9:0] bits in the IO Data Register (0x5A), while the actual status of these pins can be read from the same register bits ...
Page 19
... Philips Semiconductors The interrupt generation mode is set by the Positive INT Enable Register (0x5E) and Negative INT Enable Register (0x60). The actual interrupt status of each signal can be read from the INT Clear/Status Register (0x62). The interrupt status is cleared whenever a ‘1’ is written in the INT Clear/Status Register (0x62) for the corresponding bit ...
Page 20
... Philips Semiconductors 9. Audio codec LINE_OUT_L HEADPHONE VREFDRV DRIVER LINE_OUT_R 24.576 MHz GR LINE_IN_R PGA GL LINE_IN_L PGA 0/20 dB MICP LNA MICGND Fig 14. Audio codec block diagram. 9.1 ADC analog front-end The analog front-end of the UCB1400 consists of one stereo ADC with a selector in front of it. Using this selector, one can either select the microphone input with a dedicated Low Noise Amplifi ...
Page 21
... Philips Semiconductors 9.1.1 Line inputs The analog front-end of the UCB1400 consists of two stereo ADCs with a programmable gain stage. The full scale input voltage of the line input path is programmable in 1.5 dB steps independently for the left and right channels by setting the GL[3:0] and GR[3:0] bits in the Record Gain Register (0x1C). ...
Page 22
... Philips Semiconductors Two bits in the Feature Control/Status Register 1 (0x6A) provide control over DC filtering: • DC bit: controls the DC filter before the decimator used to compensate the DC offset is added in the ADC to remove idle tones from the audio band. • HIPS bit: controls the DC filter at the output of the decimation filter. ...
Page 23
... Philips Semiconductors 9.2.3 Filter stream DAC The FSDAC is a semi-digital reconstruction filter that converts the 1-bit data stream of the noise shaper to an analog output voltage. The filter coefficients are implemented as current sources and are summed at virtual ground of the output operational amplifier. In this way, very high signal-to-noise performance and low clock jitter sensitivity is achieved. A post-fi ...
Page 24
... Philips Semiconductors 9.3 Loopback mode The audio codec incorporates a loopback mode, in which codec input path and output path are connected in series activated when the LPBK bit in the General Purpose register (0x20) set. The loopback internally connects the digital output from the decimator of the ADC to the digital input of the Interpolator of the DAC, allowing for codec testing without the use of the AC Link ...
Page 25
... Philips Semiconductors 10. Touch screen interface 10.1 Universal touch screen matrix The UCB1400 contains a universal touch screen interface for 4-wire resistive touch screen, capable of performing position, pressure and plate resistance measurements. In addition, the touch screen can be programmed to generate interrupts when the touch screen is pressed. The last mode is also active when the UCB1400 is set in the stand-by mode ...
Page 26
... Philips Semiconductors The UCB1400’s internal voltage reference (V touch screen bias circuitry. This makes the touch screen biasing independent of supply voltage and temperature variations. Four low pass filters, one on each touch screen terminal, are built in to minimize the noise coupled from the LCD into the touch screen signals ...
Page 27
... Philips Semiconductors 10.2.2 Pressure measurement VBIAS TOUCH R X2 VBIAS R X1 TSMX R t TSMY Fig 19. Touch screen setup for pressure-1 measurement (see The pressure applied to the touch screen can be determined. In fact, the contact resistance between the X and Y plates is measured, which is a good indication of the size of the pressed spot and the applied pressure. A soft stylus, e.g., a fi ...
Page 28
... Philips Semiconductors 10.2.3 Plate resistance measurement R X1 TSMX TO ADC 1 k TSMY R Y1 Fig 20. Touch screen setup for X plate resistance measurement. The plate resistance of a touch screen varies a lot due to processing spreads. Knowing the actual plate resistance makes it possible to compensate for the plate resistance effects in the pressure resistance measurements ...
Page 29
... Philips Semiconductors In addition to the measurements made above, the touch screen can also act as an interrupt source. In this mode, the X plate of the touch screen has to be powered, and the Y plate has to be grounded. In this case, the touch screen is not biased by the active touch screen bias circuit, but by a resistor to AV biases the touch screen and the UCB1400 does not consume power unless the touch screen is touched ...
Page 30
... Philips Semiconductors 11. 10-bit ADC The UCB1400 includes a 10-bit successive approximation analog-to-digital converter (ADC) with built-in track-and-hold circuitry, and an analog multiplexer to select one of the four analog inputs (AD0-3), the four touch screen inputs (TSPX, TSMX, TSPY, TSMY) or the current of the touch screen bias circuit. The analog multiplexer contains four resistive dividers to attenuate the high voltages on the AD0-3 inputs to the ADC input range ...
Page 31
... Philips Semiconductors When ASE is ‘1’, the ADC is started at a rising edge of the signal applied to the ADCSYNC pin. In this mode, writing ‘1’ to the AS bit will arm the ADC, such that it will start in the first detected rising edge of the ADCSYNC signal. A rising edge of the signal connected to the ADCSYNC pin occurring during the tracking time is ignored ...
Page 32
... Philips Semiconductors 12. Register definition The following tables describe the register definition for the UCB1400. The UCB1400 shall follow the AC ’97 2.1 Interoperability Requirements and Recommendations as follows: • Non-implemented or reserved register bits: All reserved or non-implemented register bits (marked ‘X’ in the tables) are required to return ‘0’ when read. ...
Page 33
Table 10: Register definitions Shaded registers are read-only. Reg Name D15 D14 D13 (HEX) 00 Reset Master Volume MM X ML5 04-0C Reserved MIC ...
Page 34
Table 10: Register definitions …continued Shaded registers are read-only. Reg Name D15 D14 D13 (HEX) 60 Negative INT OVLN CLPN TMXN TPXN ADCN X enable 62 INT clear/status OVLS CLPS TMXS 64 ...
Page 35
... Philips Semiconductors 12.1 Reset register (index 0x00) Table 11: Register address: 0x00; default: 02A0 Bit Symbol Bit Symbol Table 12: Bit D15 - D10 Writing any value to this register performs a register reset, which causes all registers to revert to their default values. 12.2 Master Volume register (index 0x02) Table 13: Register address: 0x02 ...
Page 36
... Philips Semiconductors 12.3 MIC Volume register (index 0x0E) Table 15: Register address: 0x0E; default: 0000 Bit Symbol Bit Symbol Table 16: Bit D15 - 12.4 Record Select register (index 0x1A) Table 17: Register address: 0x1A; default: 0000 Bit Symbol Bit Symbol Table 18: Bit D15 - D11 ...
Page 37
... Philips Semiconductors 12.5 Record Gain register (index 0x1C) Table 19: Register address: 0x1C; default: 8000 Bit Symbol Bit Symbol Table 20: Bit D15 D14 - D12 D11 - 12.6 General Purpose register (index 0x20) Table 21: Register address: 0x20; default: 0000 Bit Symbol Bit Symbol Table 22: ...
Page 38
... Philips Semiconductors 12.7 Power-down Control/Status register (index 0x26) Table 23: Register address: 0x26; default: 000X Bit Symbol Bit Symbol Table 24: Bit D15 - D14 D13 D12 D11 D10 This read/write register is used to program power-down states and monitor subsystem readiness. The lower half of this register is read only status, a ‘1’ ...
Page 39
... Philips Semiconductors 12.8 Extended Audio ID register (index 0x28) Table 25: Register address: 0x28; default: 0001 Bit Symbol Bit Symbol Table 26: Bit D15 - D14 D13 - D1 D0 The Extended Audio read-only register that identifies which extended audio features are supported (in addition to the original AC ’97 features identified by reading the Reset register at Index 0x00) ...
Page 40
... Philips Semiconductors 12.10 Audio Sample Rate Control register (index 0x2C and 0x32) Table 29: Register address: 0x2C; default: BB80 Bit Symbol Bit Symbol Table 30: Register address: 0x32; default: BB80 Bit Symbol Bit Symbol The sample rate control registers contain 16-bit unsigned values between 0 and 65535, representing the rate of operation in Hz ...
Page 41
... Philips Semiconductors 12.11 IO Data register (index 0x5A) Table 32: Register address: 0x5A; default: 0000 Bit Symbol Bit Symbol Table 33: Bit D15 - D10 12.12 IO Direction register (index 0x5C) Table 34: Register address: 0x5C; default: 0000 Bit Symbol Bit Symbol Table 35: Bit D15 - D10 9397 750 09611 ...
Page 42
... Philips Semiconductors 12.13 Positive INT Enable register (index 0x5E) Table 36: Register address: 0x5E; default: 0000 Bit Symbol Bit Symbol Table 37: Bit D15 D14 D13 D12 D11 D10 12.14 Negative INT Enable register (index 0x60) Table 38: Register address: 0x60; default: 0000 Bit Symbol ...
Page 43
... Philips Semiconductors 12.15 INT Clear/Status register (index 0x62) Table 40: Register address: 0x62; default: 0000 Bit Symbol Bit Symbol Table 41: Bit D15 D14 D13 D12 D11 D10 12.16 Touch Screen Control register (index 0x64) Table 42: Register address: 0x64; default: 0000 Bit Symbol Bit ...
Page 44
... Philips Semiconductors Table 43: Bit D10 12.17 ADC Control register (index 0x66) Table 44: Register address: 0x66; default: 0000 Bit Symbol Bit Symbol Table 45: Bit D15 D14 - 9397 750 09611 Product data Audio codec with touch screen controller ...
Page 45
... Philips Semiconductors Table 45: Bit D1 D0 12.18 ADC Data register (index 0x68) Table 46: Register address: 0x68; default: 0000 Bit Symbol Bit Symbol Table 47: Bit D15 D14 - D10 9397 750 09611 Product data Audio codec with touch screen controller Description of ADC Control register bits ...
Page 46
... Philips Semiconductors 12.19 Feature Control/Status Register 1 (index 0x6A) Table 48: Register address: 0x6A; default: 0000 Bit Symbol Bit Symbol Table 49: Bit D15 D14 - D11 D10 - 9397 750 09611 Product data Audio codec with touch screen controller Feature Control/Status Register 1 ...
Page 47
... Philips Semiconductors 12.20 Feature Control/Status Register 2 (index 0x6C) Table 50: Register address: 0x6C; default: 0000 Bit Symbol Bit Symbol Table 51: Bit D15 D14 - D13 D12 D11 - D10 9397 750 09611 Product data Audio codec with touch screen controller Feature Control/Status Register 2 ...
Page 48
... Philips Semiconductors 12.21 Test Control register (index 0x6E) Table 52: Register address: 0x6E; default: XXXX Bit Symbol Bit Symbol Table 53: Bit D15 - This register cannot be reset and is not scan testable. It has no effect until the UCB1400 is put in Vendor-Specific Test Mode (refer to 12.22 Extra Interrupt register (index 0x70) Table 54: Register address: 0x70 ...
Page 49
... Philips Semiconductors 12.23 Vendor ID1 and ID2 registers (index 0x7C and 0x7E) Table 56: Register address: 0x7C; default: 5053 Bit Symbol Bit Symbol Table 57: Register address: 0x7E; default: 4304 Bit Symbol Bit Symbol 9397 750 09611 Product data Audio codec with touch screen controller ...
Page 50
... Philips Semiconductors 13. Limiting values Table 58: Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter V Supply voltage DD T Storage temperature stg T Operating ambient temperature amb V Electrostatic handling voltage es 14. Static characteristics Table 59: Static characteristics 3 ADCP ...
Page 51
... Philips Semiconductors 15. Dynamic characteristics Table 60: Dynamic characteristics 3 ADCP amb Symbol Parameter Audio ADC V Positive reference voltage ADCP V Negative reference voltage ADCN R Line input resistance IL C Line input capacitance IL R MIC input resistance IM C MIC input capacitance IM Z Impedance MICGND - V ...
Page 52
... Philips Semiconductors Table 60: Dynamic characteristics 3 ADCP amb Symbol Parameter Touch screen V Bias voltage i(bias) I Max. touch screen current R Max. touch screen resistance to i generate an interrupt R Ground switch on resistance gs R Power switch on resistance ps Voltage monitor ADC RES Resolution V Full scale AD0-AD3 inputs ...
Page 53
... Philips Semiconductors 16. AC Link characteristics Table 61: Characteristics 3 ADCP amb Symbol Parameter Cold/warm reset T RESET active-LOW pulse width (AC Link rst_low controller) T RESET inactive to BIT_CLK start-up delay rst2clk T SYNC active-HIGH pulse width (AC Link sync_high controller) T SYNC inactive to BIT_CLK start-up delay ...
Page 54
... Philips Semiconductors 17. Timing diagrams Fig 24. Cold reset timing. Fig 25. Warm reset timing. Fig 26. BIT_CLK and SYNC timing. 9397 750 09611 Product data Audio codec with touch screen controller T rst_low RESET BIT_CLK T sync_high SYNC BIT_CLK T clk_high BIT_CLK T T sync_high SYNC Rev. 02 — 21 June 2002 ...
Page 55
... Philips Semiconductors Fig 27. Data output and input timing. Fig 28. Data rise and fall timing. Fig 29. AC Link low power timing. 9397 750 09611 Product data t t setup BIT_CLK SDATA_OUT V OH SDATA_IN V OL SYNC BIT_CLK Trise clk SYNC Trise sync SDATA_IN ...
Page 56
... Philips Semiconductors Fig 30. ATE test mode timing. 18. Application information BIT_CLK SYNC SDATA_IN SDATA_OUT RESET IRQOUT ADCSYNC C10 MICP 4.7 uF MICGND C11 LINE_IN_L 47 uF LINE_IN_R C14 C15 47 uF 0.1 uF AD0 AD1 AD2 AD3 TSMY TSPX TSPY TSMX Y1 24.576 MHz C16 C17 Fig 31 ...
Page 57
... Philips Semiconductors TOUCH SCREEN (RESISTIVE) ADCSYNC 24.576 MHz GENERAL PURPOSE I/O PARTS Fig 32. Application block diagram. 9397 750 09611 Product data Audio codec with touch screen controller POWER SUPPLY MAIN BACKUP BATTERY (LITHIUM) THERMISTOR SPARE TOUCH MUX I/F VOLTAGE 10-BIT ADC REFERENCE AC LINK I/O AND CONTROL ...
Page 58
... Philips Semiconductors 19. Package outline LQFP48: plastic low profile quad flat package; 48 leads; body 1 pin 1 index DIMENSIONS (mm are the original dimensions) A UNIT max. 0.20 1.45 0.27 1.60 mm 0.25 0.05 1.35 0.17 Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. ...
Page 59
... Philips Semiconductors 20. Soldering 20.1 Introduction to soldering surface mount packages This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit Packages (document order number 9398 652 90011). There is no soldering method that is ideal for all surface mount IC packages. Wave soldering can still be used for certain surface mount ICs, but it is not suitable for fi ...
Page 60
... SSOP, TSSOP, VSO [1] For more detailed information on the BGA packages refer to the (LF)BGA Application Note (AN01026); order a copy from your Philips Semiconductors sales office. [2] All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum temperature (with respect to time) and body size of the package, there is a risk that internal or external package cracks may occur due to vaporization of the moisture in them (the so called popcorn effect). For details, refer to the Drypack information in the Data Handbook IC26 ...
Page 61
... Philips Semiconductors 21. Revision history Table 63: Revision history Rev Date CPCN Description 02 20020621 - Product data; second version; Engineering Change Notice 853-2358 28518; supersedes initial version UCB1400- Jan 2002 (9397 750 09242). Modifications: • Section 2 “Features” • Section 9.2.4 “Headphone driver” ...
Page 62
... This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. ...
Page 63
... Philips Semiconductors Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . 2 5 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6 Pinning information 6.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 Functional description . . . . . . . . . . . . . . . . . . . . . . . . 5 7.1 Functional block diagram . . . . . . . . . . . . . . . . . . . . . . ’97 interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8.1 Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8.2 Resetting UCB1400 . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8.3 Digital interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 8.3.1 AC-link digital serial interface protocol . . . . . . . . . . . . 7 8.3.2 AC-link audio output frame (SDATA_OUT ...