Motorola MC68VZ328 - Manual (Page 210)

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 7 6 5 4 3 2 1 BIT 0
SEL5 SEL4 SEL3 SEL2 SEL1 SEL0
TYPE rw rw rw rw rw rw
RESET
0 0 1 1 1 1 1 1
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.