Datasheet

CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 50, 51, AND 52
User’s Manual U18698EJ1V0UD
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(4) Port mode registers 3 (PM3)
These registers set port 3 input/output in 1-bit units.
When using the P34/TI52/TI010/TO00/RTC1HZ/INTP1 pins for timer input, set PM34 to 1. The output latch of
PM34 at this time may be 0 or 1.
PM3 can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets these registers to FFH.
Figure 7-13. Format of Port Mode Register 3 (PM3)
Address: FF23H After reset: FFH R/W
Symbol 7 6 5 4 3 2 1 0
PM3 1 1 1 PM34 PM33 PM32 PM31 1
PM3n P1n pin I/O mode selection (n = 1 to 4)
0 Output mode (output buffer on)
1 Input mode (output buffer off)