NEC 78K0 Series User Manual page 187

(5) Port mode register 0 (PM0)
This register sets port 0 input/output in 1-bit units.
When using the P01/TO00/TI010 and P06/TO01/TI011 pins for timer output, set PM01 and PM06 and the output
latches of P01 and P06 to 0.
When using the P00/TI000, P01/TO00/TI010, P05/TI001/SSI11, and P06/TO01/TI011 pins for timer input, set
PM00, PM01, PM05, and PM06 to 1. At this time, the output latches of P00, P01, P05, and P06 may be 0 or 1.
PM0 can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets PM0 to FFH.
CHAPTER 7 16-BIT TIMER/EVENT COUNTERS 00 AND 01
Figure 7-15. Format of Port Mode Register 0 (PM0)
Address: FF20H After reset: FFH
Symbol 7 6 5
PM0 1 PM06 PM05
PM0n P0n pin I/O mode selection (n = 0 to 6)
0 Output mode (output buffer on)
1 Input mode (output buffer off)
Preliminary User's Manual U17260EJ3V1UD
R/W
4 3 2 1
PM04 PM03 PM02 PM01 PM00
0
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