upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 227

• Manufacturer Part Number: upd78f0114m6gb-8es
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

11.3 Registers Used in A/D Converter
(1) A/D converter mode register (ADM)
The following five registers are used to control the A/D converter.
• A/D converter mode register (ADM)
• Analog input channel specification register (ADS)
• A/D conversion result register (ADCR)
• Power-fail comparison mode register (PFM)
• Power-fail comparison threshold register (PFT)
This register sets the conversion time for analog input to be A/D converted, and starts/stops conversion.
ADM can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
Notes 1.
Set so that the A/D conversion time is as follows.
• Standard products, (A) grade products: 14
• (A1) grade products:
• (A2) grade products:
Address: FF28H
Symbol
ADM
Figure 11-3. Format of A/D Converter Mode Register (ADM)
ADCS
ADCS
ADCE
FR2
<7>
0
1
0
0
0
1
1
1
0
1
Other than above
Stops conversion operation
Enables conversion operation
Stops operation of reference voltage generator
Enables operation of reference voltage generator
After reset: 00H
FR1
6
0
0
0
1
0
0
1
Boost reference voltage generator operation control
CHAPTER 11 A/D CONVERTER
User’s Manual U16227EJ3V0UD
FR2
FR0
5
0
1
0
0
1
0
A/D conversion operation control
288/f
240/f
192/f
144/f
120/f
96/f
Setting prohibited
R/W
FR1
4
X
14
16
X
X
X
X
X
µ
µ
µ
Conversion time selection
s or longer but less than 100
s or longer but less than 60
s or longer but less than 48
f
144 s
120 s
96 s
72 s
60 s
48 s
X
FR0
= 2 MHz
3
µ
µ
µ
µ
µ
µ
f
2
0
34.3 s
28.6 s
22.9 s
17.2 s
14.3 s
11.5 s
X
= 8.38 MHz f
µ
µ
µ
µ
µ
µ
1
0
Note 1
28.8 s
24.0 s
19.2 s
14.4 s
12.0 s
9.6 s
X
= 10 MHz
Note 2
µ
ADCE
µ
µ
µ
µ
µ
<0>
µ
µ
µ
s
s
s
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