m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 444

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

X : They may be either “0” or “1.”
Notes 1: These bits are invalid in the one-shot and repeat modes. (They may be either “0” or “1.”)
A-D control register 2 (Address
Note 1: When using pins AN
A-D control register 1 (Address
7 to 4
Bit
Bit
0
1
2
3
4
5
6
7
0
1
2
3
2: Use bits 2 to 0 of A-D control register 0 (address 1E
3: When using pin AN
4: When using pin AN
5: When using pin AN
6: When using pin AN
7: Writing to each bit of A-D control register 2 must be performed while the A-D conversion halts, regardless of the A-D
2: When using pin AN
3: Be sure to select the frequently-used analog input pins in the repeat sweep mode 1.
4: Fix this bit to “0” in the one-shot mode, repeat mode, and single sweep mode.
5: When this bit is cleared from “1” to “0,” be sure to start the A-D conversion after an interval of 1 µs or more has elapsed.
6: Writing to each bit of the A-D control register 1 must be performed while the A-D converter halts, regardless of the A-D
to use pin CTS
operation mode.
used only in the one-shot mode and repeat mode.
operation mode.
Analog input pin select bits 1
Fix these bits to “0000.”
A-D sweep pin select bits
(Valid in the single sweep mode,
repeat sweep mode 0, and
A-D operation mode select bit 1
(Used in the repeat sweep mode 0
and repeat sweep mode 1.)(Note 4)
Resolution select bit
A-D conversion frequency (
Fix this bit to “0.”
V
The value is “0” at reading.
repeat sweep mode 1.)
REF
connection select bit (Note 5)
2
/RTS
Bit name
Bit name
8
9
10
11
, be sure that the D-A
, be sure not to use pin CTS
7
0
2
, be sure not to use pin R
, be sure not to use pin T
, be sure that the D-A
.
to AN
7
, regardless of the A-D operation mode, be sure to fix bit 3 to “0.” Also, pins AN
AD
DB
) select bit 1
1F
(Note 1)
(Note 1)
16
16
)
)
1
output enable bit (bit 1 at address 96
7905 Group User’s Manual Rev.1.0
0
output enable bit (bit 0 at address 96
0 : Pin V
1 : Pin V
0 : Repeat sweep mode 0
1 : Repeat sweep mode 1
0 : 8-bit resolution mode
1 : 10-bit resolution mode
See Table 12.2.1.
b1 b0
b1 b0
b3 b2 b1 b0
Single sweep mode/Repeat sweep mode 0
0 0 : Pins AN
0 1 : Pins AN
1 0 : Pins AN
1 1 : Pins AN
Repeat sweep mode 1
0 0 : Pin AN
0 1 : Pins AN
1 0 : Pins AN
1 1 : Pins AN
0 X X X : Pins AN
1 0 0 0 : Pin AN
1 0 0 1 : Pin AN
1 0 1 0 : Pin AN
1 0 1 1 : Pin AN
1 1 0 0 : Do not select.
1 1 1 1 : Do not select.
X
X
D
D
2
2
2
/CLK
.
.
16
) for selection of pins AN
REF
REF
2
.
is connected.
is disconnected.
0
0
0
0
0
0
0
0
(1 pin)
and AN
to AN
to AN
to AN
and AN
to AN
to AN
8
9
10
11
0
is selected.
is selected.
is selected.
is selected.
to AN
Function
3
5
7
2
3
Function
(4 pins)
(6 pins)
(8 pins) (Note 2)
(3 pins)
(4 pins)
1
1
(2 pins)
(2 pins)
7
are selected.
16
0
) = “0” (output disabled). Also, be sure not
to AN
(Note 3)
16
Appendix 2. Control registers
) = “0” (output disabled).
7
.
b7 b6 b5 b4 b3 b2 b1 b0
b7 b6 b5 b4 b3 b2 b1 b0
0 0
(Note 2)
(Note 3)
(Note 4)
(Note 5)
(Note 6)
0
0
0
At reset
At reset
1
1
0
0
0
0
0
0
0
0
0
0
0
APPENDIX
8
to AN
R/W
R/W
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
–
11
are
Reference
Reference
12-8
12-9
12-9
16-7
12-8
20-13