hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 446
hd64338023s
Manufacturer Part Number
hd64338023s
Description
Renesas 8-bit Single-chip Microcomputer Super Low Power Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD64338023S.pdf
(697 pages)
- Current page: 446 of 697
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Section 12 A/D Converter
Bits 3 to 0—Channel Select (CH3 to CH0)
Bits 3 to 0 select the analog input channel.
The channel selection should be made while bit ADSF is cleared to 0.
Bit 3
CH3
0
0
0
0
0
1
1
1
1
1
12.2.3
The A/D start register (ADSR) is an 8-bit read/write register for starting and stopping A/D
conversion.
A/D conversion is started by writing 1 to the A/D start flag (ADSF) or by input of the designated
edge of the external trigger signal, which also sets ADSF to 1. When conversion is complete, the
converted data is set in ADRRH and ADRRL, and at the same time ADSF is cleared to 0.
Rev. 7.00 Mar 10, 2005 page 404 of 652
REJ09B0042-0700
Bit
Initial value
Read/Write
A/D Start Register (ADSR)
Bit 2
CH2
0
1
1
1
1
0
0
0
0
1
ADSF
R/W
7
0
Bit 1
CH1
*
0
0
1
1
0
0
1
1
*
—
—
6
1
Bit 0
CH0
*
0
1
0
1
0
1
0
1
*
—
—
5
1
Analog Input Channel
No channel selected
AN
AN
AN
AN
AN
AN
AN
AN
Setting prohibited
0
1
2
3
4
5
6
7
—
—
4
1
—
—
3
1
—
—
2
1
—
—
1
1
(initial value)
*: Don’t care
—
—
0
1
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