Datasheet

Appendix B Internal I/O Registers
Rev. 4.00 Sep 27, 2006 page 1071 of 1130
REJ09B0327-0400
ADCSR—A/D Control/Status Register H'FFE8 A/D Converter
7
ADF
0
R/(W)
6
ADIE
0
R/W
5
ADST
0
R/W
4
SCAN
0
R/W
3
CKS
0
R/W
0
CH0
0
R/W
2
CH2
0
R/W
1
CH1
0
R/W
*
Bit
Initial value
Read/Write
Channel select
0
1
0
1
0
1
0
1
0
1
0
1
AN0
AN1
AN2
AN3
AN4
AN5
AN6 or CIN0 to 7
AN7 or CIN8 to 15
Description
AN0
AN0, AN1
AN0, AN1, AN2
AN0, AN1, AN2, AN3
AN4
AN4, AN5
AN4, AN5, AN6 or CIN0 to 7
AN4, AN5, AN6 or CIN0 to 7,
AN7 or CIN8 to 15
Group
selection
CH1 CH0 Single mode Scan modeCH2
0
1
Note: * Only 0 can be written, to clear the flag.
Channel
selection
Clock select
0
Conversion time = 266 states (max.)
1 Conversion time = 134 states (max.)
Scan mode
0
Single mode
1 Scan mode
A/D interrupt enable
0
A/D conversion end interrupt (ADI) request disabled
1 A/D conversion end interrupt (ADI) request enabled
A/D end flag
0
[Clearing conditions]
• When 0 is written in the to ADF flag after reading ADF = 1
• When the DTC is activated by an ADI interrupt, and ADDR is read
1 [Setting conditions]
• Single mode: When A/D conversion ends
• Scan mode: When A/D conversion ends on all specified channels
A/D start
0
A/D conversion stopped
1 • Single mode: A/D conversion is started. Cleared to 0 automatically
when conversion on the specified channel ends
• Scan mode: A/D conversion is started. Conversion continues
sequentially on the selected channels until ADST is cleared to
0 by software, a reset, or a transition to standby mode or module
stop mode