UPD78F9418AGK-9EU Renesas Electronics America, UPD78F9418AGK-9EU Datasheet - Page 82

• Manufacturer Part Number: UPD78F9418AGK-9EU
• Manufacturer: Renesas Electronics America

Specifications of UPD78F9418AGK-9EU

• Lead Free Status / Rohs Status: Supplier Unconfirmed

4.2.4 Port 5
by using port mode register 5 (PM5). For a mask ROM version, whether a pull-up resistor is to be incorporated can be
specified by a mask option.
80
This is a 4-bit N-ch open-drain I/O port with an output latch. Port 5 can be specified as input or output in 1-bit units
Port 5 is set to input mode when the RESET signal is input.
Figure 4-10 shows a block diagram of port 5.
PM:
RD:
WR:
WR
WR
RD
PORT
PM
Port mode register
Port 5 read signal
Port 5 write signal
(P50 to P53)
Output latch
PM50 to PM53
Figure 4-10. Block Diagram of P50 to P53
CHAPTER 4 PORT FUNCTIONS
User’s Manual U13952EJ3V1UD
N-ch
V
DD0
Mask option resistor
Mask ROM version only.
For the flash memory version,
a pull-up resistor is not
incorporated.
P50 to P53