10-40 MC68VZ328 User’s Manual
Programming Model
10.4.11.5 Port M Select Register

The select register (PMSEL) determines if a bit position in the data register (PMDATA) is assigned as a

GPIO or to a dedicated I/O function. The settings for the PMSEL register bit positions are shown in

Table 10-55.

PMSEL Port M Select Register 0x(FF)FFF44B

BIT 7654321BIT 0
SEL5 SEL4 SEL3 SEL2 SEL1 SEL0
TYPE rw rw rw rw rw rw
RESET 00111111
0x3F
Table 10-55. Port M Select Register Description
Name Description Setting
Reserved
Bits 7– 6 Reserved These bits are reserved and should be set to
0.
SELx
Bits 5–0 Select—These bits select whether the internal chip
function or I/O port signals are connected to the pins. 0 = The dedicated function pins are connected.
1 = The I/O port function pins are connected.