Datasheet

Appendix B Internal I/O Registers
Rev. 4.00 Jun 06, 2006 page 951 of 1004
REJ09B0301-0400
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–CIN7
AN7
Description
AN0
AN0, AN1
AN0, AN1, AN2
AN0, AN1, AN2, AN3
AN4
AN4, AN5
AN4, AN5, AN6 or CIN0–CIN7
AN4, AN5, AN6 or CIN0–CIN7,
AN7
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