HMP9701CN Intersil Corporation, HMP9701CN Datasheet

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HMP9701CN

Manufacturer Part Number
HMP9701CN
Description
Manufacturer
Intersil Corporation
Datasheet
November 1998
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
Features
• Fully Compatible with the Audio Codec ‘97 Standard
• High Fidelity 16-Bit
• Additional A/D for Microphone Pass-Through
• AC Link Serial Interface Compatible with AC’97 Digital
• Fixed 48kHz Sampling Rate
• 6 Channel Input Mixer
• Programmable Powerdown Modes
• 48 Lead TQFP Package
• Single +5V Supply
Applications
• Multimedia PC Applications
• Video Conferencing
• Speaker Phones
Table of Contents
Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Serial Digital Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Control Register Description . . . . . . . . . . . . . . . . . . . . . . . . 8
Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
AC and DC Electrical Specifications . . . . . . . . . . . . . . . . . 13
Typical Performance Curves
AC Timing Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
- DAC SNR > 80dB
- ADC SNR > 80dB
Controllers
- Desk Top PCs
- Notebook PCs
- Sound Cards
- Motherboards
ADC/DAC Frequency Responses . . . . . . . . . . . . . . . . . 17
©
Harris Corporation 1998
Semiconductor
Converters
Page
1
Description
The HMP9701 is the next generation PC based audio codec
solution. The HMP9701 is fully compatible to the new AC’97
standard and, as such, interfaces to any AC’97 compliant digital
controller. The HMP9701 offers the designer a solution to sat-
isfy the demand for flexibility and improved High Fidelity sound
in a PC environment. As part of the AC’97 PC audio standard
architecture, the HMP9701 helps pave the way for PC’97 com-
pliant desktop, portable and entertainment PCs with a cost
effective high-quality audio solution.
As the analog front end of the AC’97 chipset, the HMP9701
accepts line level audio inputs from seven different sources and
converts the analog audio to 16-bit digital streams of either ste-
reo or mono data. The 48 Kss data is transmitted to the control-
ler via the AC’97 standard five wire interface. The controller
sends digital audio data to the HMP9701 to be converted to
analog stereo or monaural line output using two DACs.
We include an additional ADC to be used for Acoustic Echo
Canceling needed for video conferencing applications. This
ADC has a dedicated microphone input. It has the same high
quality performance as the stereo ADCs. The small 48 lead
TQFP (Thin 1.5mm and 7mm x 7mm footprint Quad Flat Pack-
age) makes it easy to locate the analog codec close to the ana-
log sources. Thus, reducing noise and lowering the cost of
implementation.
Ordering Information
HMP9701CN
HMP9701EVAL2
PART NUMBER
TQFP is also known as PQFP and MQFP.
HMP9701
PCI Bus Evaluation Board (Includes codec)
RANGE (
TEMP.
0 to 70
o
C)
AC’97 Audio Codec
48 Ld TQFP
PACKAGE
File Number
Q48.7x7A
PKG. NO.
4287.4

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HMP9701CN Summary of contents

Page 1

... Thus, reducing noise and lowering the cost of implementation. Ordering Information TEMP. o PART NUMBER RANGE ( C) Page HMP9701CN HMP9701EVAL2 PCI Bus Evaluation Board (Includes codec) † TQFP is also known as PQFP and MQFP. 1 AC’97 Audio Codec PACKAGE PKG. NO. ...

Page 2

Functional Block Diagram HMP9701 AC’97 AUDIO CODEC MIC1 GAIN 0dB/20dB MIC2 LINE_IN CD VIDEO AUX PHONE MONO MONO_OUT VOL MASTER LINE_OUT VOL GAM PC_BEEP STEREO SIGNAL PATH MONO SIGNAL PATH Functional Description The HMP9701 is a full-duplex ...

Page 3

Analog Mixer The Analog Mixer generates two outputs, one stereo and one mono. The stereo output is used to drive LINE_OUT and is composed of a stereo mix of all analog input sources and the audio output from the DACs. ...

Page 4

TAG PHASE SYNC 12.288MHz 81.4ns BIT_CLK SLOT SLOT SDATA_OUT 1 2 VALID FRAME TIME SLOT “VALID” BITS (“1” = TIME SLOT CONTAINS VALID DATA) “1” = FRAME CONTAINS VALID DATA The HMP9701 generates a serial bit clock (BIT_CLK) at 12.288MHz ...

Page 5

TABLE 1. BIT MAP FOR SLOT 1: CONTROL ADDRESS BITS DESCRIPTION COMMENT 19 Read/Write 1 = Read Write 18:12 Control Register Identifies the Target Control Register Index 11:0 Reserved Set to “0” Audio Output Slot 2: Control Data ...

Page 6

Input Audio Slot 2: Status Data This slot delivers control register read data. TABLE 6. BIT MAP FOR SLOT 1: STATUS DATA BITS DESCRIPTION 19:4 Control Register Stuffed with 0’s if slot tagged invalid Read Data 3:0 Reserved Stuffed with ...

Page 7

AC Link Powerdown The AC-link interface can be placed in a low power mode by setting PR4 = 1 in the Powerdown Register (see above). In this mode, both BIT_CLK and SDATA_IN are forced to a logic “low” voltage level. ...

Page 8

Testability The HMP9701 provides a test mode to support the in circuit test capabilities provided by automatic test equipment (ATE). In this mode, the HMP9701 drives its digital AC-Link outputs (BIT_CLK and SDATA_IN high impedance state. This allows ...

Page 9

TABLE 15. RECORD SELECT LEFT CHANNEL SL2:0 RIGHT RECORD SOURCE 0 MIC 1 CD_L 2 VIDEO_L 3 AUX_L 4 LINE_IN_L 5 Stereo Mix Right 6 Mono Mix 7 PHONE Default: 000 (MIC in) Record Gain Registers (Index 1Ch and 1Eh) ...

Page 10

REG NAME D15 D14 D13 00h Reset 02h Master Volume Mute X ML5 04h Reserved 06h Master Volume Mono Mute X X 08h Reserved 0Ah PC_BEEP Volume Mute X X 0Ch ...

Page 11

Pinout V DD XTL_IN XTL_OUT GND SDATA_OUT BIT_CLK GND SDATA_IN V DD SYNC RESET PC_BEEP Pin Descriptions TQFP PIN INPUT/ NAME NUMBER OUTPUT DIGITAL I/O RESET 11 I RESET - This active low signal causes a HMP9701 hardware reset that ...

Page 12

Pin Descriptions (Continued) TQFP PIN INPUT/ NAME NUMBER OUTPUT LINE_IN_R 24 I Right Line Input. The right line-level may be selected for recording via one of the stereo ADC’s via the Input Mux. In addition, this input can be gained/attenuated ...

Page 13

... Operating Conditions Temperature Range HMP9701CN CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. ...

Page 14

... BCP t Note 3 BCH t Note 3 BCL Note CRL t R2BC t SRH t S2BC t PDWN t SU2RST t Note 3 HZ MIN TYP 0 - 0.4xFs - - - 0.6xFs - HMP9701CN MIN TYP MAX UNITS - 12.288 - MHz - 81 32.56 - 48.84 ns 32.56 - 48. kHz - 20 BCP - 240 * BCP ...

Page 15

Analog-to-Digital Converters (Notes 2, 4) PARAMETER Resolution Signal-to-Noise Line Inputs Mic Inputs (Mic Gain = 0dB) Total Harmonic Distortion Line Mic Interchannel Isolation Line/Line Line/Mic Line/Aux Line/Video Gain Error (Full Scale) Inter-Channel Gain Mismatch Offset Error (0dB Gain) Gain Drift ...

Page 16

Programmable Attenuation/Gain PARAMETER Master Volume Span for LINE_OUT, MONO_OUT (0dB to -46.5dB) Master Volume Step Size Mixer Input Gain Span for LINE_IN, CD, VIDEO, AUX, PHONE, MIC (+12dB to -34.5dB) Mixer Input Gain Step SIze PC_BEEP Attenuation Span (0dB to ...

Page 17

Typical Performance Curves 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 FREQUENCY (xF FIGURE 10. ANALOG-TO-DIGITAL FREQUENCY RESPONSE (FULL SCALE LINE INPUTS, 0dB -10 -20 -30 -40 -50 -60 -70 -80 -90 ...

Page 18

AC Timing Waveforms t R2BC t CRL RESET BIT_CLK FIGURE 16. COLD RESET TIMING t S2BC t SRH SYNC BIT_CLK FIGURE 18. WARM RESET TIMING t t BCH BIT_CLK t SH SYNC FIGURE 20. CLOCKS BIT_CLK SDATA_IN SDATA_OUT SYNC HMP9701 ...

Page 19

Typical Application Schematic Diagram AC_LINK INTERFACE SD_OUT 1 BIT_CLK 2 SD_IN ‘97 COMPLIANT SYNC 4 CONTROLLER/INTERFACE IC RESET 5 6 1.0 F PC_BEEP 1.0 F PHONE 1.0 F AUX LEFT 1.0 F AUX RIGHT 1.0 F VIDEO ...

Page 20

Typical Application Schematic Notes 1. A note about the capacitors used for coupling externally input audio or for outputting audio externally: The capacitance value and the associated circuit imped- ances will determine the lower frequency cutoff of the au- dio ...

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