Datasheet

Section 16 A/D Converter
Rev. 6.00 Mar. 24, 2006 Page 280 of 412
REJ09B0142-0600
Bit Bit Name
Initial
Value R/W Description
2
1
0
CH2
CH1
CH0
0
0
0
R/W
R/W
R/W
Channel Select 0 to 2
Select analog input channels.
When SCAN = 0 When SCAN = 1
000: AN0 000: AN0
001: AN1 001: AN0 to AN1
010: AN2 010: AN0 to AN2
011: AN3 011: AN0 to AN3
100: AN4 100: AN4
101: AN5 101: AN4 to AN5
110: AN6 110: AN4 to AN6
111: AN7 111: AN4 to AN7
AN4, AN5, AN6, and AN7 do not exist in the 42-pin
version.
16.3.3 A/D Control Register (ADCR)
ADCR enables A/D conversion started by an external trigger signal.
Bit Bit Name
Initial
Value R/W Description
7 TRGE 0 R/W Trigger Enable
A/D conversion is started at the falling edge and the
rising edge of the external trigger signal (ADTRG)
when this bit is set to 1.
The selection between the falling edge and rising edge
of the external trigger pin (ADTRG) conforms to the
WPEG5 bit in the interrupt edge select register 2
(IEGR2).
6 to 1 — All 1 — Reserved
These bits are always read as 1.
0 — 0 R/W Reserved
Do not set this bit to 1, though the bit is
readable/writable.