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ADS1210 Datasheet(PDF) 32 Page - Texas Instruments |
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ADS1210 Datasheet(HTML) 32 Page - Texas Instruments |
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32 / 50 page  ADS1210, ADS1211 32 SBAS034B www.ti.com Four-Wire Interface Figure 30 shows a four-wire interface with a 8xC32 micro- processor. Again, the Slave Mode is being used. Multi-Wire Interface Figures 31 and 32 show multi-wire interfaces with a 8xC51 or 68HC11 microprocessor. In these interfaces, the mode of the ADS1210/11 is actually controlled dynamically. This could be extremely useful when the ADS1210/11 is to be used in a wide variety of ways. For example, it might be desirable to have the ADS1210/11 produce data at a steady rate and to have the converter operating in the Continuous Read Mode. But for system calibration, the Slave Mode might be preferred because multiple instructions can be issued per conversion period. Note that the MODE input should not be changed in the middle of a serial transfer. This could result in misoperation of the device. A Master/Slave Mode change will not affect the output data. Note that the XIN input can also be controlled. It is possible with some microcontrollers and digital signal processors to produce a continuous serial clock, which could be connected to the XIN input. The frequency of the clock is often settable over some range. Thus, the power dissipation of the ADS1210/11 could be dynamically varied by changing both the Turbo Mode and XIN input, trading off conversion speed and resolution for power consumption. I/O Recovery If serial communication stops during an instruction or data transfer for longer than 4 • tDATA, the ADS1210/11 will reset its serial interface. This will not affect the internal registers. The main controller must not continue the transfer after this event, but must restart the transfer from the beginning. This feature is very useful if the main controller can be reset at any point. After reset, simply wait 8 • tDATA before starting serial communication. FIGURE 31. Full Interface with a 8xC51 Microprocessor. FIGURE 30. Four-Wire Interface with a 8xC32 Microprocessor. ADS1210 A INP A INN AGND V BIAS CS DSYNC X IN X OUT DGND REF IN REF OUT AV DD MODE DRDY SDOUT SDIO SCLK DV DD P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 V CC P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 8xC51 C 2 12pF C 1 12pF XTAL AGND DGND AV DD DV DD DGND AGND 1.0µF R 1 10k Ω R 2 10k Ω ADS1210 A INP A INN AGND V BIAS CS DSYNC X IN X OUT DGND REF IN REF OUT AV DD MODE DRDY SDOUT SDIO SCLK DV DD P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 RESET RXD TXD INT0 INT1 WR RD X2 X1 V SS 8xC32 C 2 27pF C 1 27pF DV DD AGND DGND DGND AV DD DV DD D CLK Q Q D CLK Q Q 1/2 74HC74 1/2 74HC74 XTAL AGND 1.0 µF R 1 10k Ω |
Número de pieza similar - ADS1210_15 |
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Descripción similar - ADS1210_15 |
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