56F8323 Signal Pins
Table 2-2 56F8323 Signal and Package Information for the 64-Pin LQFP
Signal Name Pin No.
Type
State During
Reset
Signal Description
EXTAL
(GPIOC0)
XTAL
(GPIOC1)
TCK
TMS
TDI
TDO
46
Input
Input
External Crystal Oscillator Input — This input can be
connected to an 8MHz external crystal. If an external clock is
used, XTAL must be used as the input and EXTAL connected
to VSS.
Schmitt
Input/
Output
The input clock can be selected to provide the clock directly
to the core. This input clock can also be selected as the input
clock for the on-chip PLL.
Port C GPIO — This GPIO pin can be individually
programmed as an input or output pin.
After reset, the default state is an EXTAL input with pull-ups
disabled.
47
Output
Output Crystal Oscillator Output — This output can be connected
to an 8MHz external crystal. If an external clock is used,
XTAL must be used as the input and EXTAL connected to
VSS.
Schmitt
Input/
Output
The input clock can be selected to provide the clock directly
to the core. This input clock can also be selected as the input
clock for the on-chip PLL.
Port C GPIO — This GPIO pin can be individually
programmed as an input or output pin.
After reset, the default state is an XTAL input with pull-ups
disabled.
53
Schmitt Input, pulled Test Clock Input — This input pin provides a gated clock to
Input low internally synchronize the test logic and shift serial data to the
JTAG/EOnCE port. The pin is connected internally to a
pull-down resistor. A Schmitt trigger input is used for noise
immunity.
54
Schmitt Input, pulled Test Mode Select Input — This input pin is used to
Input high internally sequence the JTAG TAP controller’s state machine. It is
sampled on the rising edge of TCK and has an on-chip
pull-up resistor.
55
Schmitt Input, pulled Test Data Input — This input pin provides a serial input data
Input high internally stream to the JTAG/EOnCE port. It is sampled on the rising
edge of TCK and has an on-chip pull-up resistor.
56
Output Tri-stated Test Data Output — This tri-stateable output pin provides a
serial output data stream from the JTAG/EOnCE port. It is
driven in the shift-IR and shift-DR controller states, and
changes on the falling edge of TCK.
MOTOROLA
56F8323 Technical Data
13
Preliminary