Format Of Port Mode Register 2 - NEC PD789860 User Manual

(4) Port mode register 2 (PM2)
PM2 sets port 2 to input/output in 1-bit units.
When using the P20/TMO/BSFO pin as a timer output, clear the PM20 and P20 output latch to 0.
When using the P21/TMI pin as a timer input, set the PM21 to 1.
This register is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to FFH.
Symbol 7 6
PM2 1 1
PM2m
0 Output mode (output buffer on)
1 Input mode (output buffer off)
92
CHAPTER 9 8-BIT TIMERS 30 AND 40
Figure 9-7. Format of Port Mode Register 2
5 4 3
1 1 1
P2m pin input/output mode (m = 0, 1)
User's Manual U14826EJ5V0UD
2 1 0 Address After reset
1 PM21 PM20
R/W
FF22H FFH R/W