Port M Select Register; Table 10-55 Port M Select Register Description - Motorola MC68VZ328 User 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
BIT 7
TYPE
RESET
Name
Reserved Reserved
Bits 7–6
SELx Select—These bits select whether the internal chip
Bits 5–0 function or I/O port signals are connected to the pins.
10-40
Port M Select Register
6 5
SEL5
rw
0 0 1
Table 10-55. Port M Select Register Description
Description
MC68VZ328 User's Manual
4 3 2
SEL4 SEL3 SEL2
rw rw rw
1 1 1
0x3F
These bits are reserved and should be set to
0.
0 = The dedicated function pins are connected.
1 = The I/O port function pins are connected.
0x(FF)FFF44B
1 BIT 0
SEL1 SEL0
rw rw
1 1
Setting