UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 293

• 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

(4) Analog input channel specification register (ADS)
Cautions 1. Be sure to clear bits 4 to 7 to 0.
This register specifies the input port of the analog voltage to be A/D converted.
ADS can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
Address: FF2BH
Symbol
ADS
2
3. Do not set a pin to be used as a digital input pin with ADPC with ADS.
4. If data is written to ADS, a wait cycle is generated. Do not write data to ADS when the CPU is
conversion in the input mode by using port mode register 8, 9 (PM8, PM9). If the channel is
set in the output mode, selection of ADPC is disabled.
operating on the subsystem clock and the peripheral hardware clock is stopped. For details,
see CHAPTER 31 CAUTIONS FOR WAIT.
Because ADS and ADPC do not control input and output, set the channel used for A/D
Figure 13-8. Format of Analog Input Channel Specification Register (ADS)
ADS3
0
0
0
0
0
0
0
0
1
1
1
1
7
0
After reset: 00H
ADS2
0
0
0
0
1
1
1
1
0
0
0
0
6
0
R/W
CHAPTER 13 A/D CONVERTER
ADS1
User’s Manual U17554EJ4V0UD
5
0
0
0
1
1
0
0
1
1
0
0
1
1
ADS0
4
0
0
1
0
1
0
1
0
1
0
1
0
1
ANI0
ANI1
ANI2
ANI3
ANI4
ANI5
ANI6
ANI7
ANI8
ANI9
ANI10
ANI11
ADS3
3
Analog input channel specification
ADS2
2
ADS1
1
ADS0
0
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