MP7652 데이터 시트보기 (PDF) - Exar Corporation

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MP7652

4-Channel Voltage Output 15 MHz, Input Bandwidth, 8-Bit Multiplying DACs with 3-Wire Serial Digital Port and Independent References

Exar Corporation 

MP7652

8085

ALE

WR

SOD

8

8

8212

8

ADDRESS BUS

+5

E1

E3

E2

3

A0 to A2

74LS138

ADDRESS

DECODER

DATA BUS

LD

CLK

SDI

MP7652

PRESET

FROM SYSTEM RESET

Figure 7. 8085 Interface (Simplified Diagram)

NOTES:

1. Clock generated by WR and decoding address 8000

2. Data is clocked into the DAC shift register by executing memory write instructions. the clock input is

generated by decoding address 8000 and WR. Data is then loaded into the DAC register with a memory

write instruction to address 4000.

3. Serial data must be present in the right justified format in registers H & L of the microprocessor.

Rev. 1.00

10

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