Datasheet

Section 16 A/D Converter
Rev.6.00 Mar. 18, 2009 Page 668 of 980
REJ09B0050-0600
16.3.3 A/D Control Register (ADCR)
ADCR enables A/D conversion start by an external trigger input.
It also sets the A/D converter operating mode and the A/D conversion time.
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 (TPU)
is enabled
10: A/D conversion start by external trigger (TMR)
is enabled
11: A/D conversion start by external trigger pin
(ADTRG) is enabled
5
4
SCANE
SCANS
0
0
R/W
R/W
Scan Mode
Selects single mode or scan mode as the A/D
conversion operating mode.
0×: 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 to 0
Sets 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 — All 0 — Reserved
These bits are always read as 0 and cannot be
modified.
Legend: ×: Don’t care.