Section 13 A/D Converter (ADC)
Rev. 3.00 Sep. 27, 2007 Page 482 of 758
REJ09B0243-0300
Bit Bit
Name
Initial
Value
R/W Description
2 to 0
CH[2:0]
000
R/W
Channel Select 2 to 0
Select analog input channels. See table 13.3.
When changing the operating mode, first clear the
ADST bit to 0.
Note:
*
Writing 0 to this bit after reading it as 1 clears the flag and is the only allowed way.
13.3.3
A/D Control Registers_0 and _1 (ADCR_0 and ADCR_1)
ADCR for each module controls A/D conversion.
Bit:
Initial value:
R/W:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R
R
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
-
-
ADST
-
-
-
-
-
-
-
-
-
-
-
-
-
Bit Bit
Name
Initial
Value
R/W Description
15, 14
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
13 ADST 0
R/W A/D
Start
Starts or stops A/D conversion. When this bit is set to
1, A/D conversion is started. When this bit is cleared
to 0, A/D conversion is stopped and the A/D converter
enters the idle state. In single or single-cycle scan
mode, this bit is automatically cleared to 0 when A/D
conversion ends on the selected single channel. In
continuous scan mode, A/D conversion is continuously
performed for the selected channels in sequence until
this bit is cleared by a software, reset, or in software
standby mode or module standby mode.
12 to 0
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
Содержание SH7124 R5F7124
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