Rev. 1.00, 09/03, page 513 of 704
18.3.3
A/D Control Register (ADCR)
ADCR enables an A/D conversion start by an external trigger input.
Bit
Bit Name
Initial Value
R/W
Description
7
6
TRGS1
TRGS0
0
0
R/W
R/W
Timer Trigger Select 1 and 0
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 conversion start trigger
(TPU) is enabled
10: A/D conversion start by conversion start trigger
(TMR) is enabled
11: A/D conversion start by
ADTRG
pin is enabled
5
4
SCANE
SCANS
0
0
R/W
R/W
Scan Mode
Select single mode or scan mode as 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
Set the A/D conversion time.
Only set bits CKS1 and CKS0 while 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
—
—
0
0
R/W
R/W
Reserved
These bits are always read as 0 and cannot be
modified.
[Legend] x
:
Don’t care.
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