Table of Contents
Advertisement
S3C9454B/F9454B
9
I/O PORTS
OVERVIEW
The S3C9454B/F9454B has three I/O ports: with 18 pins total. You access these ports directly by writing or
reading port data register addresses.
All ports can be configured as LED drive. (High current output: typical 10 mA)
Port
0
Bit-programmable I/O port for schmitt trigger input or push-pull output.
Pull-up resistors are assignable by software. Port 0 pins can also be used
as alternative function. (ADC input, external interrupt input).
1
Bit-programmable I/O port for schmitt trigger input or push-pull, open-drain
output. Pull-up or pull-down resistors are assignable by software. Port 1
pins can also oscillator input/output or reset input by smart option. P1.2 is
input only.
2
Bit-programmable I/O port for schmitt trigger input or push-pull, open-drain
output. Pull-up resistor are assignable by software. Port 2 can also be
used as alternative function (ADC input, CLO, T0 clock output)
Table 9-1. S3C9454B/F9454B Port Configuration Overview
Function Description
I/O PORTS
Programmability
Bit
Bit
Bit
9-1
Advertisement
Table of Contents
