Io Description - Samsung S5PC110 Manual

S5PC110_UM

3.3 IO DESCRIPTION

The following table lists the external signals between the SPI and external device. The unused SPI ports are used
as General Purpose I/O ports. Refer to "General Purpose I/O" chapter for more information.
Signal I/O
SPI_0_CLK In/Out
SPI_1_CLK
SPI_0_MISO In/Out
SPI_1_MISO
SPI_0_MOSI In/Out
SPI_1_MOSI
SPI_0_nSS In/Out
SPI_1_nSS
NOTE: Type field indicates whether pads are dedicated to the signal or pads are connected to the multiplexed signals.
Description
XspiCLK is the serial clock used to control time of
data transfer.
Out, when used as master
In, when used as slave
This port is the input port in Master mode. Input
mode is used to get data from slave output port.
Data are transmitted to master through this port in
slave mode.
Out, when used as slave
In, when used as master
This port is the output port in Master mode. This port
is used to transfer data from master output port.
Data are received from master through this port in
slave mode.
Out, when used as master
In, when used as slave
Slave selection signal. All data TX/RX sequences
are executed if XspiCS is low.
Out, when used as master
In, when used as slave
3 SERIAL PERIPHERAL INTERFACE
Pad
XspiCLK[0]
XspiCLK[1]
XspiMISO[0]
XspiMISO[1]
XspiMOSI[0]
XspiMOSI[1]
XspiCSn[0]
XspiCSn[1]
Type
muxed
muxed
muxed
muxed
3-5