Port 1 - NEC mPD780852 Series Preliminary User's Manual

WR
PUO
PU00 to PU07
RD
WR
PORT
Output latch
(P00 to P07)
WR
PM
PM00 to PM07
Alternate
functions
PU: Pull-up resistor option register
PM: Port mode register
RD: Port 0 read signal
WR: Port 0 write signal

4.2.2 Port 1

Port 1 is a 5-bit input only port.
Alternate functions include an A/D converter analog input.
Figure 4-3 shows a block diagram of port 1.
RD: Port 1 read signal
78
CHAPTER 4 PORT FUNCTIONS
Figure 4-2. P00 to P07 Block Diagram
Selector
Figure 4-3. P10 to P14 Block Diagram
RD
Preliminary User's Manual U14581EJ3V0UM00
V
DD0
P-ch
P00/INTP0 to P02/INTP2
P03/SCK2
P04/SO2
P05/SI2
P06
P07
P10/ANI0
to
P14/ANI4