SNAD01C

8-CHANNEL 8-BIT ADC

(1) Command ID: (101).

(2) The digital data of each channel is sent to the DIO port with the sequence of channel 7 to 0.

(3) After all of the channels are read, if the START is kept in LOW and CLK is kept in HIGH/LOW

transition, the digital data of each channel is sent to the DIO port again with the sequence of

channel 7 to 0 cyclically.

(4) Pulling START to HIGH to terminates this digital input reading.

Note: Once a channel is programmed as analog type, the corresponding data is “0” in digital input

reading command.

6.6. Power Down & Channel Wake-Up

00

0

11

1

SNAD01 enters into

power-down mode

START

CLK

DIO

DIO

Figure-8 The timing diagram of power down command

START

CLK

CH n

CH n

DIO

DIO

Wake-Up

Host CPU

HiZ

HiZ

Wake-Up

Procedure Ending

Figure-9 The timing diagram of power down command

Version: 1.5

July 31, 2003

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