UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 108

• 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

5.2.8 Port 8
using port mode register 8 (PM8).
configuration register (ADPC) and in the input mode by using PM8. Use these pins starting from the lower bit.
output mode by using PM8 (for details, see 13.3 (5) A/D port configuration register (ADPC)).
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Port 8 is an 8-bit I/O port with an output latch. Port 8 can be set to the input mode or output mode in 1-bit units
This port can also be used for A/D converter analog input.
To use P80/ANI0 to P87/ANI7 as digital input pins, set them in the digital I/O mode by using the A/D port
To use P80/ANI0 to P87/ANI7 as digital output pins, set them in the digital I/O mode by using ADPC and in the
All P80/ANI0 to P87/ANI7 are set in the analog input mode when the reset signal is generated.
Figure 5-17 shows a block diagram of port 8.
Caution Make the AV
Digital I/O selection
Analog input selection
P8:
PM8:
RD:
WR××: Write signal
WR
WR
RD
ADPC
PORT
PM
Port register 8
Port mode register 8
Read signal
Table 5-3. Setting Functions of P80/ANI0 to P87/ANI7 Pins
REF
PM80 to PM87
(P80 to P87)
Output latch
Input mode
Output mode
Input mode
Output mode
pin the same potential as the V
PM8
P8
Figure 5-17. Block Diagram of P80 to P87
PM8
CHAPTER 5 PORT FUNCTIONS
A/D converter
User’s Manual U17554EJ4V0UD
Selects ANI.
Does not select ANI.
Selects ANI.
Does not select ANI.
ADS
−
−
DD
pin when port 8 is used as a digital port.
Digital input
Digital output
Analog input (to be converted)
Analog input (not to be converted)
Setting prohibited
P80/ANI0 to P87/ANI7 Pin
P80/ANI0 to
P87/ANI7