Freescale Semiconductor, Inc.
Table 3. 56F826 Signal and Package Information for the 100 Pin LQFP
Signal
Name
Pin No.
Type
Description
SRFS
(GPIOC1)
SRCK
(GPIOC2)
52 Input/ Output SSI Serial Receive Frame Sync (SRFS)—This bidirectional pin is used
by the receive section of the SSI as frame sync I/O or flag I/O. The STFS
can be used only by the receiver. It is used to synchronize data transfer
and can be an input or an output.
Input/Output Port C GPIO—This is a General Purpose I/O (GPIO) pin with the
capability of being individually programmed as input or output.
After reset, the default state is GPIO input.
53
Input/Output SSI Serial Receive Clock (SRCK)—This bidirectional pin provides the
serial bit rate clock for the Receive section of the SSI. The clock signal
can be continuous or gated and can be used by both the transmitter and
receiver in synchronous mode.
Input/Output Port C GPIO—This is a General Purpose I/O (GPIO) pin with the
capability of being individually programmed as input or output.
STD
After reset, the default state is GPIO input.
54
Output
SSI Transmit Data (STD)—This output pin transmits serial data from the
SSI Transmitter Shift Register.
(GPIOC3)
STFS
(GPIOC4)
Input/Output Port C GPIO—This is a General Purpose I/O (GPIO) pin with the
capability of being individually programmed as input or output.
After reset, the default state is GPIO input.
55
Input
SSI Serial Transmit Frame Sync (STFS)—This bidirectional pin is used
by the Transmit section of the SSI as frame sync I/O or flag I/O. The
STFS can be used by both the transmitter and receiver in synchronous
mode. It is used to synchronize data transfer and can be an input or
output pin.
Input/Output Port C GPIO—This is a General Purpose I/O (GPIO) pin with the
capability of being individually programmed as input or output.
STCK
(GPIOC5)
After reset, the default state is GPIO input.
56 Input/ Output SSI Serial Transmit Clock (STCK)—This bidirectional pin provides the
serial bit rate clock for the transmit section of the SSI. The clock signal
can be continuous or gated. It can be used by both the transmitter and
receiver in synchronous mode.
Input/Output Port C GPIO—This is a General Purpose I/O (GPIO) pin with the
capability of being individually programmed as input or output.
After reset, the default state is GPIO input.
12
56F826 Technical Data
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