Types, Features, And Configurations Of Digital I/O Ports; Types And Features Of Digital Ports - NEC PD754144 User Manual

6.1.1 Types, features, and configurations of digital I/O ports

Table 6-1 shows the types of digital I/O ports.
Figures 6-2 to 6-9 show the configuration of each port.
Port Function
PORT3 4-bit I/O
PORT6
PORT7 4-bit input
PORT8 1-bit I/O
P61 is shared with an external vector interrupt input pin and a noise eliminator is selectable (for details, refer to
7.3 Hardware Controlling Interrupt Function).
When the RESET signal is asserted, the output latches of ports 3, 6, and 8 are cleared to 0, the output buffers
are turned off, and the ports are set to the input mode.
CHAPTER 6 PERIPHERAL HARDWARE FUNCTION
Table 6-1. Types and Features of Digital Ports
Operation and Features
Can be set to input or output mode in 1-bit units.
4-bit input only port
On-chip pull-up resistor can be specified by mask option
in 1-bits units.
Can be set to input or output mode in 1-bit units.
User's Manual U10676EJ3V0UM
Remarks
Also used for PTO0 to PTO2
pins.
Also used for AVREF, INT0,
PTH00, and PTH01 pins.
Also used for KR4 to KR7 pins.
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