Datasheet

Appendix B Internal I/O Registers
Rev.6.00 Sep. 27, 2007 Page 1184 of 1268
REJ09B0220-0600
ADCR—A/D Control Register H'FF99 A/D Converter
7
TRGS1
0
R/W
6
TRGS0
0
R/W
5
—
1
—
4
—
1
—
3
CKS1
1
R/W
0
—
1
—
2
CH3
1
R/W
1
—
1
—
0
1
0
1
0
1
Description
Channel Select
Reserved
Only 1 should be written
to this bit
Timer Trigger Select
Bit
Initial value
Read/Write
:
:
:
A/D conversion start by external trigger is disabled
A/D conversion start by external trigger (TPU) is enabled
A/D conversion start by external trigger (8-bit timer) is enabled
A/D conversion start by external trigger pin (ADTRG) is enabled
TRGS1TRGS1
0
1
0
1
0
1
Description
Clock Select
Conversion time = 530 states (max)
Conversion time = 68 states (max)
Conversion time = 266 states (max) (Initial value)
Conversion time = 134 states (max)
CKSCKS1
ADCSR
Bit 3Bit 3