AD664KN Просмотр технического описания (PDF) - Analog Devices

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AD664KN

Monolithic 12-Bit Quad DAC

Analog Devices 

AD664

Simple AD664 to MC68000 Interface

Figure 28 shows an AD664 connected to an MC68000. In this

memory-mapped I/O scheme, the “left-justified” data is written

in one 12-bit input word. Four address bits are used to perform

the on-chip D/A selection as well as the various operating fea-

tures. The R/W signal controls the RD function and system

reset controls RST.

This scheme can be converted to write “right-justified’’ data by

connecting the data inputs to DATA bits D0 through D11

respectively. Other options include controlling the QS0, QS1

and QS2 pins with UDS and LDS to provide a way to write

8-bit input and read 8-bit output words.

Figure 28. AD664 to MC68000 Interface

–18–

REV. D

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