Datasheet

Appendix B Internal I/O Registers
Rev.7.00 Feb. 14, 2007 page 1032 of 1108
REJ09B0089-0700
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
⎯
1
R/W
1
⎯
1
⎯
0
1
0
1
0
1
Description
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
CKS1 is used in combination with CKS, bit 3 in ADCSR.
Reserved
Only 1 should be written to this bit.
Conversion time = 530 states (max.)
Conversion time = 68 states (max.)
Conversion time = 266 states (max.)
Conversion time = 134 states (max.)
CKSCKS1
ADCSR
Bit 3Bit 3
DADR0—D/A Data Register 0 H'FFA4 D/A Converter
DADR1—D/A Data Register 1 H'FFA5 D/A Converter
7
0
R/W
6
0
R/W
5
0
R/W
4
0
R/W
3
0
R/W
0
0
R/W
2
0
R/W
1
0
R/W
Stores data for D/A conversion
Bit
Initial value
Read/Write
:
:
: