S3C4510B
I/O PORTS
12 I/O PORTS
OVERVIEW
The S3C4510B has 18 programmable I/O ports. You can configure each I/O port to input mode, output mode, or
special function mode. To do this, you write the appropriate settings to the IOPMOD and IOPCON registers. User
can set filtering for the input ports using IOPCON register.
The modes of the ports from port0 to port7 are determined only by the IOPMOD register. But port[11:8] can be
used as xINTREQ[3:0], port[13:12] as nXDREQ[1:0], port[15:14] as nXDACK[1:0], port[16] as TOUT0, or port[17]
as TOUT1 depending on the settings in IOPCON register.
VDD
IOPMOD
IOPCON
Alternate Functions
Port0 - Port7
Port8/xINTREQ0
Output
Latch
IOPDATA
(Write)
Port11/xINTREQ3
Port12/nXDREQ0
Port13/nXDREQ1
Port14/nXDACK0
Port15/nXDACK1
Port16/TOUT0
IOPDATA
(Read)
Port17/TOUT1
Active
On/Off & Edge
Detection
Input
Latch
Filter
On/Off
Interrupt or DMA
Request
IOPCON
IOPCON
Figure 12-1. I/O Port Function Diagram
12-1
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