SNAD02C
8-CHANNEL 10-BIT ADC
(1) DIO is HiZ while START is HIGH.
(2) The interface logic begins to interpret a command at the falling edge of the START signal.
(3) The command ID (sent by Host) is received in the first three clock cycles from DIO.
(4) The operations include Channel setting, ADC Reading, Digital Input Reading and Power
Down.
(5) DIO becomes to HiZ while START returns to HIGH.
Command ID
Operation
000
001
010
Power Down (0)
Channel Attribute Setting (1:Analog, 0:Digital)
Channel Wakeup Function Setting
(1:Enable, 0:Disable)
011
100
101
110
111
Control Register Setting
ADC Conversion
Digital Input Reading
Reserved
Power Down (1)
Table-2 Command Description Table
a. 000/111: ADC enters into power down after receiving this command.
b. 001: Set the attribute of each channel to be an analog or a digital input with the sequence of
channel 7 to 0. (1:Analog; 0:Digital)
c. 010: Set the wakeup function of each channel to be enabled or disabled with the sequence of
channel 7 to 0. (1:Enable; 0:Disable)
d. 011: Setting the values of control registers.
e. 100: ADC starts to convert the analog signal of the selected channel after receiving this
command.
f.
101: ADC starts to read the digital input of every channel with the sequence of channel 7 to 0.
g. 110: ADC enters into testing mode.
Version: 1.3
July 31, 2003
6
SONIX [ SONIX TECHNOLOGY COMPANY ]
