Section 15 A/D Converter
Rev. 3.00 Mar. 14, 2006 Page 555 of 804
REJ09B0104-0300
15.3.3
A/D Control Register (ADCR)
ADCR enables A/D conversion to be started by an external trigger input.
7
TRGS1
0
R/W
6
TRGS0
0
R/W
5
SCANE
0
R/W
4
SCANS
0
R/W
3
CKS1
0
R/W
2
CKS0
0
R/W
1
—
0
R
0
—
0
R
Bit
Bit Name
Initial Value
R/W
Bit Bit
Name
Initial
Value R/W Description
7
6
TRGS1
TRGS0
0
0
R/W
R/W
Timer Trigger Select 1 and 0
These bits select enabling or disabling of the start of A/D
conversion by a trigger signal.
00: A/D conversion start by external trigger is disabled
01: A/D conversion start by external trigger from TPU is
enabled
10: Setting prohibited
11: A/D conversion start by the
ADTRG
pin is enabled
*
5
4
SCANE
SCANS
0
0
R/W
R/W
Scan Mode
These bits select the A/D conversion operating mode.
0X: Single mode
10: Scan mode. A/D conversion is performed
continuously for channels 1 to 4.
11: Scan mode. A/D conversion is performed
continuously for channels 1 to 8.
3
2
CKS1
CKS0
0
0
R/W
R/W
Clock Select 1 and 0
These bits set the A/D conversion time. Set bits CKS1
and CKS0 only while A/D conversion is stopped (ADST =
0).
00: A/D conversion time = 530 states (max)
01: A/D conversion time = 266 states (max)
10: A/D conversion time = 134 states (max)
11: A/D conversion time = 68 states (max)
1, 0
All
0
R
Reserved
These are read-only bits and cannot be modified.
[Legend]
X: Don't care
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