m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 316
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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Fig. 12.2.2 Structure of A-D control register 0
12.2.1 A-D control registers 0, 1, and 2
Figures 12.2.2, 12.2.3 and 12.2.4 show the structures of the A-D control registers 0, 1 and 2, respectively.
A-D control register 0 (Address 1E
Notes 1: When using pins AN
Bit
0
1
2
3
4
5
6
7
2: When using pin AN
3: When writing to this bit, use the MOVM (MOVMB) or STA (STAB, STAD) instruction.
4: Writing to each bit (except writing of “0” to bit 6) of the A-D control register 0 must be performed while the A-D converter
Setting bit 3 of the analog input pin select bits 1 to “1” invalidates these bits.
Also, these bits are invalid in the single sweep mode, repeat sweep mode 0 and repeat sweet mode 1. (Each may be
either “0” or “1.”)
halts, regardless of the A-D operation mode.
Analog input pin select bits
(Valid in the one-shot and repeat
A-D operation mode select bits 0
Fix this bit to “0.”
A-D conversion start bit
A-D conversion frequency (
select bit 0
modes.)
Bit name
7
, be sure that the D-A
0
to AN
7
, be sure to fix bit 3 of the analog input pin select bits 1 (bits 3 to 0 at address DB
(Note 1)
16
7905 Group User’s Manual Rev.1.0
)
AD
)
0
output enable bit (bit 0 at address 96
b2 b1 b0
See Table 12.2.1.
0 0 0 : AN
0 0 1 : AN
0 1 0 : AN
0 1 1 : AN
1 0 0 : AN
1 0 1 : AN
1 1 0 : AN
1 1 1 : AN
b4 b3
0 : A-D conversion halts.
1 : A-D conversion starts.
0 0 : One-shot mode
0 1 : Repeat mode
1 0 : Single sweep mode
1 1 : Repeat sweep mode 0 or 1
0
1
2
3
4
5
6
7
is selected.
is selected.
is selected.
is selected.
is selected.
is selected.
is selected.
is selected.
Function
(Note 2)
16
) = “0” (output disabled).
A-D CONVERTER
b7 b6 b5 b4 b3 b2 b1 b0
12.2 Block description
0
Undefined
Undefined
Undefined
At reset
0
0
0
0
0
(Note 3)
16
R/W
) to “0.”
RW
RW
RW
RW
RW
RW
RW
RW
12-5
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