Port Mode Register 3 Format - NEC PD78076 User Manual

(4) Port mode register 3 (PM3)
This register sets port 3 input/output in 1-bit units.
When using the P31/TO1 and P32/TO2 pins for timer output, set PM31, PM32, and output latches of P31
and P32 to 0.
PM3 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets PM3 to FFH.
Symbol 7 6 5
PM3 PM37 PM36 PM35
CHAPTER 9 8-BIT TIMER/EVENT COUNTERS 1 AND 2
Figure 9-7. Port Mode Register 3 Format
4 3 2 1 0
PM34 PM33 PM32 PM31 PM30
Address After Reset
FF23H FFH
PM3n P3n Pin Input/Output Mode Selection (n = 0 to 7)
0 Output mode (output buffer ON)
1 Input mode (output buffer OFF)
R/W
R/W
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