Specifications

Panasonic PAN4555 SNAP Module
Because it is based on the Freescale MC1321x chip, the PAN4555 wireless module can also run
SNAP.
NOTE – If you are using a SNAP Engine based on the PAN4555 module, skip ahead to the next
section.
This section is for users putting the PAN4555 module directly down on their board. Because the
hardware is not in the SNAP Engine form factor, there is no such concept as GPIO. You should write
your script using plain “IO” numbering (Refer to the SNAP 2.2 Migration Guide if you don’t know
what this means).
It is important to note that not all of the MC1321x pins are brought out on the PAN4555 module. The
table on the following page summarizes the correspondence between SNAPpy IO, module pin, and the
underlying processor pin.
Timers
Normally the PAN4555 uses timer 2 in the hardware for its system clock. Feature bit 0x40 of NV
Parameter 11 can be set to instruct SNAP to use timer 1 instead. This affects the availability of PWM
on associated pins. Refer to the Freescale documentation for details on how to make use of this.
Page 130 of 202 SNAP Reference Manual Document Number 600-0007K