UPD78F9418A NEC, UPD78F9418A Datasheet - Page 121
UPD78F9418A
Manufacturer Part Number
UPD78F9418A
Description
(UPD7894xxA) 8-Bit Single Chip Microcontrollers
Manufacturer
NEC
Datasheet
1.UPD78F9418A.pdf
(319 pages)
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(4)
Symbol
PM2
Port mode register 2 (PM2)
This register sets port 2 to input/output in 1-bit units.
When using the P23/COMPTOUT0/TO2 pin for timer output, set PM23 and the output latch of P23 to 0.
PM2 is set using a 1-bit or 8-bit memory manipulation instruction.
RESET input sets PM2 to FFH.
PM27 PM26 PM25 PM24 PM23 PM22 PM21 PM20
PM23
7
0
1
Output mode (output buffer on)
Input mode (output buffer off)
6
5
CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 00 TO 02
4
Figure 7-7. Format of Port Mode Register 2
3
2
User’s Manual U13952EJ3V0UD
P23 pin I/O mode selection
1
0
Address
FF22H
After reset
FFH
R/W
R/W
121
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