HD64F2149 Datasheet, PDF (967/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

ADCSR—A/D Control/Status Register
Bit
Initial value
Read/Write
7
ADF
0
R/(W)*
6
ADIE
0
R/W
5
ADST
0
R/W
4
SCAN
0
R/W
H'FFE8
3
CKS
0
R/W
2
CH2
0
R/W
A/D Converter
1
CH1
0
R/W
0
CH0
0
R/W
Channel select
Group
selection
Channel
selection
CH2 CH1 CH0
0
0
0
1
1
0
1
1
0
0
1
1
0
1
Description
Single mode
Scan mode
AN0
AN0
AN1
AN0, AN1
AN2
AN0, AN1, AN2
AN3
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 AN4, AN5, AN6 or CIN0 to 7,
AN7 or CIN8 to 15
Clock select
0 Conversion time = 266 states (max.)
1 Conversion time = 134 states (max.)
Scan mode
0 Single mode
1 Scan mode
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
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 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
Note: * Only 0 can be written, to clear the flag.
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