SNAD02C
8-CHANNEL 10-BIT ADC
Name
PH
Function
Set the pull-up resistor of the channel in digital input mode. 1:ON, 0:OFF.
Set the pull-down resistor of the channel in digital input mode.
“1”: ON, “0”: OFF.
PL
RF, MB Set the reference source (from internal bandgap or “REF” pin)
RF=0, MB=1: reference voltage from “REF” pin
RF=1, MB=0: reference voltage from internal bandgap
Table-3
Note:
1. The condition of both PH=1 and PL=1 is prohibited.
2. Pull-up and pull-down resistors are not activated while the corresponding channel is set as
analog input mode.
3. Before into power down mode, the “RF” and “MB” register must set up “0”, otherwise the standby
current will more than 1uA.
6.4. ADC Read Timing
START
CLK
ADC Reading
HiZ
CM2 CM1
X
X
D9
D8
D7 D6
D5
D4 D3 D2
D1 D0
CM0 ID2 ID1 ID0
DIO
Port Input
Port Output
Figure-6 The timing diagram of ADC reading
Version: 1.3
July 31, 2003
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SONIX [ SONIX TECHNOLOGY COMPANY ]
