CHAPTER 1 INTRODUCTION
User’s Manual U13850EJ4V0UM
50
(n) Ports
As shown below, the following ports have general-purpose port functions and control pin functions.
Port
I/O
Port Function
Control Function
Port 0
8-bit I/O
NMI, external interrupt, A/D converter trigger, RTP trigger
Port 1
6-bit I/O
Serial interface
Port 2
8-bit I/O
Serial interface, timer I/O
Port 3
8-bit I/O
Timer I/O, external address bus, serial interface
Port 4
8-bit I/O
External address/data bus
Port 5
8-bit I/O
Port 6
6-bit I/O
External address bus
Port 7
8-bit input
A/D converter analog input
Port 8
4-bit input
Port 9
7-bit I/O
External bus interface control signal I/O
Port 10
8-bit I/O
Real-time output port, external address bus, key return input, IEBus
data I/O
Port 11
4-bit I/O
General-
purpose port
Wait control, external address bus
(o) IEBus controller
IEBus controller is a small-scale digital data transfer system aiming at data transfer among units.
IEBus controller is incorporated only in the V850/SB2.
