UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 290

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

Note This can be set only when 4.0 V ≤ AV
290
Cautions 1.
Remark f
A/D Converter Mode Register (ADM)
FR2
A/D Converter Mode Register (ADM)
FR2
0
0
0
0
1
1
0
0
0
0
1
FR1
FR1
0
0
1
1
0
0
Other than above
0
0
1
1
0
Other than above
2.
3.
4.
PRS
: Peripheral hardware clock frequency
FR0
Set the conversion times with the following conditions.
• 4.0 V ≤ AV
• 2.7 V ≤ AV
• 2.3 V ≤ AV
When rewriting FR2 to FR0, LV1, and LV0 to other than the same data, stop A/D conversion
once (ADCS = 0) beforehand.
Change LV1 and LV0 from the default value, when 2.3 V ≤ AV
The above conversion time does not include clock frequency errors. Select conversion time,
taking clock frequency errors into consideration.
FR0
0
1
0
1
0
1
0
1
0
1
0
LV1
LV1
0
0
0
0
0
0
0
0
0
0
0
REF
REF
REF
LV0
LV0
0
0
0
0
0
0
1
1
1
1
1
≤ 5.5 V: f
< 4.0 V: f
< 2.7 V: f
Table 13-2. A/D Conversion Time Selection
264/f
176/f
132/f
88/f
66/f
44/f
Setting prohibited
480/f
320/f
240/f
160/f
120/f
Setting prohibited
PRS
PRS
PRS
PRS
PRS
PRS
PRS
PRS
PRS
PRS
PRS
AD
AD
AD
CHAPTER 13 A/D CONVERTER
= 0.6 to 3.6 MHz
REF
= 0.6 to 1.8 MHz
= 0.6 to 1.48 MHz
User’s Manual U17554EJ4V0UD
(1) 2.7 V ≤ AV
(2) 2.3 V ≤ AV
≤ 5.5 V.
Setting prohibited
33.0
22.0
16.5
11.0
Setting prohibited
60.0
40.0
30.0
f
PRS
μ
μ
μ
μ
μ
μ
μ
Conversion Time Selection
= 4 MHz
Conversion Time Selection
s
s
s
s
f
s
s
s
PRS
Note
= 2 MHz
REF
REF
26.4
17.6
13.2
8.8
6.6
Setting prohibited
≤ 5.5 V
< 2.7 V
f
PRS
μ
μ
s
s
μ
μ
μ
= 10 MHz
Note
Note
s
s
s
Setting prohibited
64.0
48.0
32.0
Setting prohibited
μ
μ
μ
f
s
s
s
PRS
13.2
8.8
6.6
Setting prohibited
f
= 5 MHz
REF
PRS
μ
μ
s
s
μ
= 20 MHz
< 2.7 V.
Note
Note
s
f
f
f
f
f
f
f
f
f
f
f
PRS
PRS
PRS
PRS
PRS
PRS
PRS
PRS
PRS
PRS
PRS
Conversion Clock
Conversion Clock
/12
/8
/6
/4
/3
/2
/12
/8
/6
/4
/3
(f
(f
AD
AD
)
)