SN8P1700
8-bit micro-controller build-in 12-bit ADC
128-CHANNEL ANALOG TO DIGITAL
CONVERTER
OVERVIEW
This analog to digital converter of SN8P1700 has 8-input sources with up to 4096-step resolution to transfer analog
signal into 12-bits digital data. The sequence of ADC operation is to select input source (AIN0 ~ AIN7) at first, then set
GCHS and ADS bit to “1” to start conversion. When the conversion is complete, the ADC circuit will set EOC bit to “1”
and final value output in ADB register. This ADC circuit can select between 8-bit and 12-bit resolution operation by
programming ADLEN bit in ADR register.
AIN0/P4.0
AIN1/P4.1
AIN2/P4.2
A/D
AIN3/P4.3
CONVERTER
8/12
AIN4/P4.4
(ADC)
AIN5/P4.5
AIN6/P4.6
AIN7/P4.7
Figure 12-1. AD Converter Function Diagram
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Note: For 8-bit resolution the conversion time is 12 steps.
For 12-bit resolution the conversion time is 16 steps.
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Note: The analog input level must be between the AVREFH and AVSS.
Note: The AVREFH level must be between the AVDD and AVSS.
SONiX TECHNOLOGY CO., LTD
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Revision 1.94
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