NEC UPD789026 Series User Manual page 108

(2) Port mode register 5 (PM5)
This register sets port 5 input/output in 1-bit units.
When using the P50/TI0/TO0 pin for timer output, set PM50 and the output latch of P50 to 0.
PM5 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets PM5 to FFH.
7
Symbol
PM5 1
PM50
0
Output mode (output buffer ON)
1 Input mode (output buffer OFF)
www.DataSheet4U.com
108
CHAPTER 7 8-BIT TIMER/EVENT COUNTER
Figure 7-3. Port Mode Register 5 Format
6 5 4
1 1 1 PM53
User's Manual U11919EJ3V0UM00
3 2 1
PM52 PM51 PM50
P50 Pin Input/Output Mode Selection
0
Address After Reset
FF25H FFH
R/W
R/W