s3c4510b Samsung Semiconductor, Inc., s3c4510b Datasheet - Page 379

• Manufacturer Part Number: s3c4510b
• Description: 16/32-bit Risc Microcontroller
• Manufacturer: Samsung Semiconductor, Inc.

S3C4510B
12
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.
Interrupt or DMA
IOPDATA
(Read)
Request
Output
Alternate Functions
Latch
Input
Latch
I/O PORTS
IOPDATA
(Write)
On/Off & Edge
IOPCON
Figure 12-1. I/O Port Function Diagram
Detection
IOPCON
Active
IOPMOD
IOPCON
On/Off
Filter
V
DD
Port0 - Port7
Port8/xINTREQ0
Port11/xINTREQ3
Port12/nXDREQ0
Port13/nXDREQ1
Port14/nXDACK0
Port15/nXDACK1
Port16/TOUT0
Port17/TOUT1
I/O PORTS
12-1