Section 13 A/D Converter (ADC)
Rev. 3.00 Sep. 27, 2007 Page 493 of 758
REJ09B0243-0300
13.4.7 2-Channel
Scanning
In 2-channel scan mode, since the four channels of analog input are divided into groups 0 and 1,
triggers for activation of groups 0 and 1 are independently specifiable. Conversion end interrupts
in 2-channel scan mode can be generated either on completion of group 0 or group 1 or on
completion of group 0 and group 1. If conversion is to be started by triggers, the different sources
for groups 0 and 1 are specified in ADTSR. A request for conversion by group 1 generated during
conversion by group 0 is ignored. Figure 13.4 shows an example of operation when TRG4AN of
the MTU2 has been specified as the A/D conversion start request by group 0 and TRG4BN of the
MTU2 has been specified as the A/D conversion start request by group 1.
TADCORA_4
TGRA_3
TADCORB_4
H'0000
TCNT_4
A/D conversion start request
CONADF bit in ADCSR = 1
CONADF bit in ADCSR = 0
A/D conversion end (ADF)
AN0
conversion
AN1
conversion
AN2
conversion
AN3
conversion
Figure 13.4 Example of 2-Channel Scanning
Содержание SH7124 R5F7124
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