Samsung S3C2451X User Manual page 257

S3C2451X RISC MICROPROCESSOR I/O PORTS
11
I/O PORTS
OVERVIEW
S3C2451X has 174 multi-functional input/output port pins and there are 12 ports as shown below:
— Port A(GPA) : 27-output port
— Port B(GPB) : 11-input/output port
— Port C(GPC) : 16-input/output port
— Port D(GPD) : 16-input/output port
— Port E(GPE) : 16-input/output port
— Port F(GPF) : 8-input/output port
— Port G(GPG) : 16-input/output port
— Port H(GPH) : 15-input/output port
— Port J(GPJ) : 16-input/output port
— Port K(GPK) : 16-input/output port
— Port L(GPL) : 15-input/output port
— Port M(GPM) : 2-input port
Each port can be easily configured by software to meet various system configurations and design requirements.
You have to define which function of each pin is used before starting the main program. If a pin is not used for
multiplexed functions, the pin can be configured as I/O ports.
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