
I/O PORTS
S3C3410X RISC MICROPROCESSOR
7-2
Table 7-1. S3C3410X Port Configuration Overview
Port
Configuration Options
Recommend
0
General I/O port with pull-up resistor: P0.0, P0.1, P0.2, P0.3 and P0.4 can
alternately serve as external capture input or clock input for Timer0, 1, 2, 3
and 4 respectively. P0.5 and P0.6 can alternately serve as PWM or Toggle
Out for a Timer3 and 4 respectively. P0.7 can be used as external interrupt
input EINT0 or external port write strobe signal(nWREXP).
Bit Programmable
1
General I/O port: P1.4 – P1.7 can alternately serve as external interrupt
inputs of EINT4 – EINT7, or can be configured as address line of A20 – A23
for external interface. P1.0 – P1.3 can alternately as address line of A16 –
A19 for external interface.
Bit Programmable
2
General I/O port: P2.0 – P2.6 can be used alternately as chip select signal
lines for the external interface. P2.7 can be used as external interrupt input
EINT1 or chip select strobes for the extra device(nECS0).
Bit Programmable
3
General I/O port: P3.0 – P3.6 can be used alternately as bus control signal
lines for the external interface: nWBE0:nBE0:DQM0, nWBE1:nBE1:DQM1,
nCAS0:nSRAS, nCAS1:nSCAS, SCKE, SCLK. P3.7 can be used alternately
as external interrupt input EINT2 or chip select strobes for the extra
device(nECS1).
Bit Programmable
4
General I/O port: P4.0 – P4.7 can be configured as data lines, D8 – D15 for
the external interface or address line, A16 – A23.
Bit Programmable
5
General I/O port: P5.0 and P5.2 can be used alternately as external request
input for DMA module: nDREQ0, nDREQ1. P5.1 and P5.3 can be used
alternately as external acknowledge output for DMA module: nDACK0,
nDACK1. P5.4 and P5.5 can be used alternately as serial data and serial
clock for IIC module: IICSDA and IICSCK. P5.6 and P5.7 can be used
alternately as input and output for UART module: URXD and UTXD.
Bit Programmable
6
General I/O port: P6.0 and P6.4 can be used alternately as serial data input
pins for SIO module: SIORXD0 and SIORXD1. P6.2 and P6.6 can be used
alternately as serial data output pins for SIO module: SIOTXD0 and
SIOTXD1. P6.1 and P6.5 can be used alternately as external clock
input/output for SIO module: SIOCLK0 and SIOCLK1. P6.7 can be used as
external interrupt input EINT3.
Bit Programmable
7
General I/O port: can be used as a real time output by 8-bit or 4-bit unit. If
TEST[1:0] bit is set to "10" or "11", P0.0 – P0.4 can be used as JTAG test
port: nTCK (P7.0), TMS (P7.1), TDI (P7.2), nTRST (P7.3), TDO (P7.4).
Bit Programmable
8
Analog input channels AIN0 – AIN7, alternately general input port or external
interrupt input EINT8(P8.4), EINT9(P8.5), EINT10(P8.6) and EINT11(P8.7).
Bit Programmable
9
General Output Port: P9.0 and P9.1 can be used alternately as LCD control
signal, LP and DCLK
Bit Programmable