UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 109

• 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

5.2.9 Port 9
using port mode register 9 (PM9).
configuration register (ADPC) and in the input mode by using PM9. Use these pins starting from the lower bit.
output mode by using PM9 (for details, see 13.3 (5) A/D port configuration register (ADPC)).
Port 9 is an 4-bit I/O port with an output latch. Port 9 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 P90/ANI8 to P93/ANI11 as digital input pins, set them in the digital I/O mode by using the A/D port
To use P90/ANI8 to P93/ANI11 as digital output pins, set them in the digital I/O mode by using ADPC and in the
All P90/ANI8 to P93/ANI11 are set in the analog input mode when the reset signal is generated.
Figure 5-18 shows a block diagram of port 9.
Caution Make the AV
Digital I/O selection
Analog input selection
P9:
PM9:
RD:
WR××: Write signal
WR
WR
RD
ADPC
PORT
PM
Read signal
Port register 9
Port mode register 9
Table 5-4. Setting Functions of P90/ANI8 to P93/ANI11 Pins
REF
PM90 to PM93
(P90 to P93)
Output latch
Input mode
Output mode
Input mode
Output mode
pin the same potential as the V
PM9
P9
Figure 5-18. Block Diagram of P90 to P93
PM9
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 9 is used as a digital port.
Digital input
Digital output
Analog input (to be converted)
Analog input (not to be converted)
Setting prohibited
P90/ANI8 to P93/ANI11 Pin
P90/ANI8 to
P93/ANI11
109