UPD780078 Datasheet, PDF (98/592 Pages) NEC – 8-Bit Single-Chip Microcontrollers

WRPU
RD
CHAPTER 6 PORT FUNCTIONS
Figure 6-2. Block Diagram of P00 to P03
VDD0
PU0
PU00 to PU03
P-ch
Alternate
function
WRPORT
WRPM
Output latch
(P00 to P03)
PM0
PM00 to PM03
P00/INTP0
P02/INTP2,
P03/INTP3/ADTRG
PU0: Pull-up resistor option register 0
PM0: Port mode register 0
RD: Read signal
WR××: Write signal
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User’s Manual U14260EJ3V1UD