SNAD01C 查看數據表（PDF） - Sonix Technology Co., Ltd
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SNAD01C Datasheet PDF : 27 Pages
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SNAD01C
8-CHANNEL 8-BIT ADC
(1) Command ID: (100)
(2) 3-bit channel number data behind command ID.
(3) The analog signal of the selected channel is sampled to ADC. ADC refers the reference
voltage and converts the sampled analog signal to digital domain by successive-
approximation method.
(4) The 8-bit output data (result of conversion) of ADC is sent to DIO port from MSB and is
triggered by CLK. The maximum clock frequency is 500kHz @ 2.7v. (Maximum conversion
rate=25KHz)
(5) After the 8-bits ADC data has been sent out, if the START is kept in LOW and CLK is kept in
High/Low transition, then the data with uncertain value are kept appearing on DIO. These
data can just be ignored.
Channel ID[2:0]
Selected Channel
000
CH0
001
CH1
010
CH2
011
CH3
100
CH4
101
CH5
110
CH6
111
CH7
Table-4 Channel Selection Table
6.5. Timing of Digital Input Reading
START
CLK
Digital Input
Reading
HiZ CM
DIO
2
CM
1
CM0
DI[7] DI[6] DI[5] DI[4]
DI[3] DI[2]
DI[1] DI[0] DI[7] DI[6] DI[5] DI[4] DI[3]
Port Input
Port Output
Figure-7 The timing diagram of the digital input reading
Version: 1.5
9
July 31, 2003
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