SM59R16A2 Datasheet, PDF (61/67 Pages) SyncMOS Technologies,Inc – 8-Bit Micro-controller

SM59R16A2/SM59R08A2
8-Bit Micro-controller
64KB/32KB ISP Flash & 2KB RAM embedded
18 10-bit Analog-to-Digital Converter (ADC)
SM59R16A2/SM59R08A2 provides four channel 10-bit ADC. This ADC is in SAR architecture with
excellent precision.
It is advised that there will be no large current surge caused by IO ports or any other functions when
the ADC is measuring. The large current surge may influence the voltage reference, and make the
results inaccurate.
The Digital output of the sampled analog signal is put into ADCD [9:0]. The ADC interrupt vector is
53h.
The embedded 4-channel ADC is a 10-bit-resolution device with measurement range 0 ~ 3.3V.
The 4 channels are in Port4 [7] ~ Port4 [4]. The following figure shows the precision of this ADC in
real application:
P.S. When ADC module used at VDD=5.0V system，User must attention below two items：
1. The Port4【7：4】must output “0000” value to delete the offset voltage before start the ADC convertor。
2.
Fig. 20-1: The precision of 10-b ADC（The VDD=3.3V）
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M034
61
Ver.B SM59R16A2/SM59R08A2 06/2009