UPD78F0411GA-GAM-AX Datasheet, PDF (159/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 6 16-BIT TIMER/EVENT COUNTERS 00
(6) Port mode register 3 (PM3)
This register sets port 3 input/output in 1-bit units.
When using the P34/TI52/TI010/TO00/RTC1HZ/INTP1 pin for timer output, set PM34 and the output latches of
P34 to 0.
When using the P33/TI000/RTCDIV/RTCCL/BUZ/INTP2 and P34/TI52/TI010/TO00/RTC1HZ/INTP1 pins for timer
input, set PM33 and PM34 to 1. At this time, the output latches of P33 and P34 may be 0 or 1.
PM3 can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets PM3 to FFH.
Figure 6-11. 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 P3n pin I/O mode selection (n = 1 to 4)
0 Output mode (output buffer on)
1 Input mode (output buffer off)
User’s Manual U18698EJ1V0UD
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