DS1086L Dallas Semiconductor, DS1086L Datasheet
DS1086L
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DS1086L Summary of contents
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... CC GND DECOUPLING CAPACITORS (0.1µF and 0.01µF) *SDA AND SCL CAN BE CONNECTED DIRECTLY HIGH IF THE DS1086L NEVER NEEDS TO BE PROGRAMMED IN-CIRCUIT, INCLUDING DURING PRODUCTION TESTING. EconOscillator is a trademark of Dallas Semiconductor. For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ...
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Spread-Spectrum EconOscillator ABSOLUTE MAXIMUM RATINGS Voltage Range on V Relative to Ground ..........-0.5V to +6.0V CC Voltage Range on SPRD, PDN, OE, SDA, and SCL Relative to Ground* ..................................-0 *This voltage must not exceed 6.0V. Stresses beyond ...
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Spread-Spectrum EconOscillator MASTER OSCILLATOR CHARACTERISTICS (V = 2.7V to 3.6V -40°C to +85°C PARAMETER SYMBOL Master Oscillator Frequency Default Master Oscillator Frequency Master Oscillator Frequency Tolerance Voltage Frequency Variation Temperature Frequency Variation Dither Frequency Range ...
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Spread-Spectrum EconOscillator AC ELECTRICAL CHARACTERISTICS (V = 2.7V to 3.6V -40°C to +85°C PARAMETER SYMBOL Frequency Stable After Prescaler Change Frequency Stable After DAC or t DACstab Offset Change Power-Up Time t por Enable of ...
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Spread-Spectrum EconOscillator AC ELECTRICAL CHARACTERISTICS—2-WIRE INTERFACE (continued 2.7V to 3.6V -40°C to +85°C PARAMETER SYMBOL Setup Time for STOP t SU:STO Capacitive Load for Each Bus Line EEPROM Write Cycle Time Input Capacitance ...
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Spread-Spectrum EconOscillator (V = 3.3V 25°C, unless otherwise noted SUPPLY CURRENT vs. MASTER OSCILLATOR FREQUENCY 9 8 15pF LOAD 4.7pF LOAD 3 2 PRESCALER = ...
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Spread-Spectrum EconOscillator (V = 3.3V 25°C, unless otherwise noted POWER-DOWN CURRENT vs. SUPPLY VOLTAGE 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 2.7 3.0 SUPPLY VOLTAGE (V) SUPPLY CURRENT WITH OUTPUT DISABLED vs. SUPPLY ...
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... Figure 2. Temperature Variation Over Frequency V CC µP XTL1/OSC1 4.7kΩ XTL2/OSC2 2-WIRE INTERFACE V CC *SDA AND SCL CAN BE CONNECTED DIRECTLY HIGH IF THE DS1086L NEVER NEEDS TO BE PROGRAMMED IN-CIRCUIT, INCLUDING DURING PRODUCTION TESTING. Pin Description MAXIMUM THERMAL VARIATION vs. MASTER OSCILLATOR FREQUENCY ...
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... SPRD GND Figure 3. Block Diagram Detailed Description A block diagram of the DS1086L is shown in Figure 3. The internal master oscillator generates a square wave with a 33.3MHz to 66.6MHz frequency range. The fre- quency of the master oscillator can be programmed with the DAC register over a two-to-one range in 5kHz steps ...
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... See the Example Frequency Calculations section for a more in-depth look at using the registers. ________________Register Definitions The DS1086L registers are used to program the output frequency, dither percent, dither rate, and 2-wire address. Table 1 shows a summary of the registers and detailed descriptions follow below. ...
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Spread-Spectrum EconOscillator JS2 to JS0: Jitter Percentage. These three bits select the amount of jitter in percent. The SPRD pin must be a logic high for the jitter to be enabled. Bit combinations not shown are reserved. JS2 JS1 ...
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... Since the two-byte DAC register is left justified, 647 is converted to hex (0287h) and bit-wise shifted left six places. The value to be programmed into the DAC reg- ister is A1C0h. In summary, the DS1086L is programmed as follows: PRESCALER = 0080h OFFSET = 10h (if range was read as 12h) DAC = A1C0h Notice that the DAC value was rounded ...
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... Finally, the DAC value is calculated as shown in Equation 8. DAC VALUE The result is then converted to hex (0118h) and then left-shifted, resulting in 4600h to be programmed into the DAC register. − summary, the DS1086L is programmed as follows: EXPECTED × 100 PRESCALER = 0000h (6) OFFSET = 13h (if RANGE was read as 12h) 11 05875 ...
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... A master device that generates the serial clock (SCL), controls the bus access, and generates the START and STOP conditions must con- trol the bus. The DS1086L operates as a slave on the 2- wire bus. Connections to the bus are made through the open-drain I/O lines SDA and SCL. ...
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... However, in this mode, the direction bit indicates that the transfer direc- tion is reversed. Serial data is transmitted on SDA by the DS1086L while the serial clock is input on SCL. START and STOP conditions are recognized as the beginning and end of a serial transfer. ...
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Spread-Spectrum EconOscillator TYPICAL 2-WIRE WRITE TRANSACTION MSB LSB START A2* A1* A0* R/W DEVICE READ/ DEVICE IDENTIFIER ADDRESS WRITE EXAMPLE 2-WIRE TRANSACTIONS (WHEN A0, A1, AND A2 ARE ZERO) A) SINGLE BYTE WRITE START 1 ...