
Power, Ground and Peripheral Signals
MOTOROLA
Pin Descriptions
2-17
Preliminary
2
SC10
(GPIOD3)
Input / Output
Input / Output
ESSI Serial Control Pin 0 (SC10)—The function
of this pin is determined by the selection of either
synchronous or asynchronous mode. For
asynchronous mode, this pin will be used for the
receive clock I/O. For synchronous mode, this pin
is used either for transmitter1 output or for serial
I/O flag 0.
Port D GPIO 3—This is a General Purpose I/O pin
available when the ESSI is not in use.
——
—
11
SC11
(GPIOD4)
Input / Output
Input / Output
ESSI Serial Control Pin 1 (SC11)—The function
of this pin is determined by the selection of either
synchronous or asynchronous mode. For
asynchronous mode, this pin is the receiver frame
sync I/O. For synchronous mode, this pin is used
either for transmitter2 output or for serial I/O flag 1.
Port D GPIO (4)—This is a General Purpose I/O
pin available when the ESSI is not in use.
——
—
11
SC12
(GPIOD5)
Input / Output
Input / Output
ESSI Serial Control Pin 2 (SC12)—This pin is
used for frame sync I/O. SC02 is the frame sync
for both the transmitter and receiver in
synchronous mode and for the transmitter only in
asynchronous mode. When configured as an
output, this pin is the internally generated frame
sync signal. When configured as an input, this pin
receives an external frame sync signal for the
transmitter (and the receiver in synchronous
operation).
Port D GPIO 5—This is a General Purpose I/O pin
available when the ESSI is not in use.
——
—
11
Table 2-13. Serial Peripheral Interface
Signal Name
Signal Type
Signal Description
853
Pins
854
Pins
855
Pins
857
Pins
858
Pins
MISO
(GPIOF0)
Input / Output
Input / Output
SPI Master In / Slave Out—This serial data pin is
an input to a master device and an output from a
slave device. The slave device places data on the
MISO line a half-cycle before the clock edge the
master device uses to latch the data. The driver on
this pin can be configured as an open-drain by the
SPI’s Wired-OR mode (WOM) bit when this pin is
configured for SPI operation.
Port F GPIO 0—This is a General Purpose I/O pin
capable of being independently programmed as an
input or output pin.
11
—
11
Table 2-12. Enhanced Synchronous Serial Interface 1 (Continued)
Signal Name
Signal Type
853
Pins
854
Pins
855
Pins
857
Pins
858
Pins