m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 351
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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[Precautions for A-D converter]
1. Be sure to clear the V
2. Writing to the following must be performed before a trigger is generated (in other words, while the A-D
6. Reading from A-D register i (when the comparator function is selected) must be performed before occurrence
7. When using pin AN
8. Setting of bit 3 of the analog input pin select bits 1 (bits 3 to 0 at address DB
9. Refer to section “Appendix 7. Countermeasures against noise” when using the A-D converter.
A-D CONVERTER
[Precautions for A-D converter]
3. When using pins AN
4. Pins AN
5. The analog input pin select bits 0 (bits 2 to 0 at address 1E
12-40
converter halts); this must be done independent of the operation mode of the A-D converter.
Especially, when any instruction which clears the V
executed (in other words, the resistor ladder network is connected with pin V
interval of 1
input pin select bits 1 (bits 3 to 0 at address DB
3 to 0 at address DB
mode or repeat mode after the operation is performed in the single sweep mode, repeat sweep mode 0,
or repeat sweep mode 1.
of a trigger (in other words, while the A-D converter halts.). The value undefined at reading.
When using pin AN
Also, be sure not to use pin CTS
When using pin AN
When using pin AN
When using pin AN
analog input pin select bits 0 (bits 2 to 0 at address 1E
• Each bit of the A-D control register 0, except writing of “0” to bit 6
• Each bit of the A-D control register 1
• Each bit of the A-D control register 2
• A-D register i (when the comparator function is selected)
• Comparator function select register 0
• Comparator function select register 1
• Comparator result register 0
• Comparator result register 1
8
to AN
s or more must be elapsed before occurrence of a trigger.
11
can be used only in the one-shot mode or repeat mode.
7
8
, be sure that the D-A
, be sure that the D-A
9
10
11
, be sure not to use pin CTS
0
16
, be sure not to use pin R
, be sure not to use pin T
to AN
) must be specified again if the user switches the operation mode to the one-shot
REF
connection select bit to “0.”
7
, regardless of the A-D operation mode, be sure to fix bit 3 of the analog
2
/RTS
7905 Group User’s Manual Rev.1.0
2
.
0
1
output enable bit (bit 0 at address 96
output enable bit (bit 1 at address 96
X
X
D
D
16
2
2
2
/CLK
.
.
) to “0.”
REF
2
.
connection select bit from “1” to “0” has been
16
).
16
) and the analog input pin select bits 1 (bits
REF
16
16
16
) = “0” (output disabled).
) = “0” (output disabled).
) to “1” invalidates the
by this instruction), an
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