Datenblatt-Suchmaschine für elektronische Bauteile |
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AD7776 Datenblatt(PDF) 8 Page - Analog Devices |
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AD7776 Datenblatt(HTML) 8 Page - Analog Devices |
8 / 12 page AD7776/AD7777/AD7778 –8– REV. A Microprocessor Interfacing Circuits The AD7776/AD7777/AD7778 family of ADCs is intended to interface to DSP machines such as the ADSP-2101, ADSP-2105, the TMS320 family and microcontrollers such as the 80C196 family. Figure 7 shows the AD7776/AD7777/AD7778 interfaced to the TMS320C10 at 20.5 MHz and the TMS320C14 at 25 MHz. Figure 8 shows the interface with the TMS320C25 at 40 MHz. Note that one wait state is required with this interface. The ADSP-2101-50 and the ADSP-2105-40 interface is shown in Figure 9. One wait state is required with these machines. *ADDITIONAL PINS OMITTED FOR CLARITY ADDRESS BUS DATA BUS D15–D0 TMS320C10-20.5 TMS320C14-25 A11–A0 WE (C10) DEN (C14) REN CS DB9–DB0 RD WR AD7776/ AD7777/ AD7778* ADDR DECODE Figure 7. AD7776/AD7777/AD7778 to TMS320C10 and TMS320C14 Interface ADDRESS BUS DATA BUS *ADDITIONAL PINS OMITTED FOR CLARITY CS DB9–DB0 RD WR D15–D0 A15–A0 IS READY MSC STRB R/W TMS320C25-40 ADDR DECODE AD7776/ AD7777/ AD7778* Figure 8. AD7776/AD7777/AD7778 to TMS320C25 Interface Figure 10 shows the interface with the 80C196KB at 12 MHz and the 80C196KC at 16 MHz. One wait state is required with the 16 MHz machine. The 80C196 is configured to operate with a 16-bit multiplexed address/data bus. Table I provides a truth table for the AD7776/AD7777/AD7778 and summarizes their microprocessor interfacing features. Note that a read instruction to any of the devices while a conversion is in progress immediately stops that conversion and returns unreliable data over the data bus. *ADDITIONAL PINS OMITTED FOR CLARITY ADDRESS BUS DATA BUS CS DB9–DB0 RD WR D23–D6 A13–A0 WR RD ADSP-2101-50 ADSP-2105-40 ADDR DECODE EN DMS AD7776/ AD7777/ AD7778* Figure 9. AD7776/AD7777/AD7778 to ADSP-2101 and ADSP-2105 Interface *ADDITIONAL PINS OMITTED FOR CLARITY DATA BUS (10) CS DB9–DB0 AD7776/ AD7777/ AD7778* RD WR ADDRESS BUS WR RD 80C196KB-12 80C196KC-16 AD15–AD6 (PORT 4) ALE ‘373 LATCH ADDR DECODER AD7–AD0 (PORT 3) Figure 10. AD7776/AD7777/AD7778 to 80C196 Interface |
Ähnliche Teilenummer - AD7776_02 |
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Ähnliche Beschreibung - AD7776_02 |
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