Samsung YP-P10 User Manual Page 296

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S3C2440A RISC MICROPROCESSOR I/O PORTS
9-23
PORT J CONTROL REGISTERS (GPJCON, GPJDAT) (Continued)
GPJDAT Bit Description
GPJ15:0] [12:0] When the port is configured as an input port, the corresponding bit is the
pin state. When the port is configured as an output port, the pin state is
the same as the corresponding bit.
When the port is configured as functional pin, the undefined value will be
read.
GPJUP Bit Description
GPJ[12:0] [12:0] 0: The pull up function attached to the corresponding port pin is enabled.
1: The pull up function is disabled.
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