upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 272

• Manufacturer Part Number: upd78f0148m1gka1-9eu
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(1) A/D converter mode register (ADM)
272
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.
2.
• Standard products, (A) grade products: 14
• (A1) grade products:
• (A2) grade products:
Set so that the A/D conversion time is as follows.
A booster circuit is incorporated to realize low-voltage operation. The operation of the circuit that
generates the reference voltage for boosting is controlled by ADCE, and it takes 14
start to operation stabilization. Therefore, when ADCS is set to 1 after 14
from the time ADCE is set to 1, the conversion result at that time has priority over the first conversion
result.
Address: FF28H
Symbol
ADM
Figure 13-3. 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 13 A/D CONVERTER
User’s Manual U15947EJ3V1UD
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
34.3 s
28.6 s
22.9 s
17.2 s
14.3 s
11.5 s
2
0
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
µ
s or more has elapsed
µ
s from operation