UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 164

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

(1) A/D converter mode register (ADM)
164
Address: FF80H
Symbol
ADM
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 signal generation clears this register to 00H.
Remarks 1. f
Note 1. Even when the ADCE = 0 (comparator operation stopped), the A/D conversion operation starts if
FR2
0
1
1
1
0
0
1
0
ADCS
ADCS
ADCE
1
0
<7>
Note 1
Note 1
0
1
FR1
After reset: 00H
0
0
1
0
1
0
1
1
2. The conversion time refers to the total of the sampling time and the time from successively
the ADCS is set to 1. However, the first conversion data is out of the guaranteed-value range, so
ignore it.
comparing with the sampling value until the conversion result is output.
XP
Stops conversion operation
Starts conversion operation
Stops operation of comparator
Enables operation of comparator
FR0
: Oscillation frequency of clock to peripheral hardware
0
0
0
1
0
1
1
1
Figure 10-3. Format of A/D Converter Mode Register (ADM)
6
0
AV
4.5 V
AV
≥ 4.0 V
AV
2.85 V
AV
≥ 2.7 V
Range
Reference
Voltage
REF
REF
REF
REF
R/W
≥
≥
Note 2
FR2
5
CHAPTER 10 A/D CONVERTER
Sampling
Time
12/f
24/f
96/f
48/f
48/f
24/f
176/f
88/f
User’s Manual U16898EJ5V0UD
XP
XP
XP
XP
XP
XP
XP
Note 3
XP
FR1
A/D conversion operation control
Conversion
36/f
72/f
144/f
96/f
72/f
48/f
224/f
112/f
Comparator operation control
4
Time
XP
XP
XP
XP
XP
XP
XP
XP
Note 4
FR0
1.5
3.0
12.0
6.0
6.0
3.0
22.0
11.0
Sampling
Time
3
µ
µ
µ
µ
µ
s
s
µ
s
s
s
µ
µ
Note 3
s
s
s
f
XP
= 8 MHz
4.5
9.0
18.0
12.0
9.0
6.0
28.0
14.0
Conversion
Time
Note6
2
0
µ
µ
µ
µ
s
s
µ
µ
s
s
µ
µ
Note 4
s
s
s
s
1.2
2.4
9.6
4.8
4.8
Setting
prohibited
Note5
(2.4
17.6
Setting
prohibited
Note5
(8.8
Sampling
Time
1
0
µ
µ
µ
µ
µ
µ
µ
s
s
s
s
s
µ
Note 3
s)
s)
f
s
XP
= 10 MHz
3.6
7.2
14.4 µ s
9.6
7.2
Setting
prohibited
Note5
(4.8
22.4
Setting
prohibited
Note5
(11.2
Conversion
Time
ADCE
<0>
µ
µ
µ
µ
µ
µ
s
s
s
s
µ
Note 4
s)
s
s)