Datasheet

78K0/Ix2 CHAPTER 6 16-BIT TIMERS X0 AND X1
R01UH0010EJ0500 Rev.5.00 203
Feb 28, 2012
(7) Port mode register 3 (PM3)
This register sets port 3 input/output in 1-bit units.
When using the P31/TOX00/INTP2/TOOLC1, P32/TOX01/INTP3/TOOLD1, P33/TOX10, and P34/TOX11/INTP4 pins
for timer output, set PM31 to PM34 and the output latches of P31 to P34 to 0
.
PM3 can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets PM3 to FFH.
Figure 6-17. Format of Port Mode Register 3 (PM3)
Address: FF23H After reset: FFH R/W
Symbol 7 6 5 4 3 2 1 0
PM3 PM37 PM36 PM35 PM34 PM33 PM32 PM31 PM30
PM3n P3n pin I/O mode selection (n = 0 to 7)
0 Output mode (output buffer on)
1 Input mode (output buffer off)
Remark The figure shown above presents the format of port mode register 3 of the 78K0/IB2 (30 pins)
products. For the format of port mode register 3 of other products, refer to (1) Port mode
registers (PMxx) in 4.3 Registers Controlling Port Function.