MC68HC16Z1 Datasheet, PDF (385/500 Pages) Freescale Semiconductor, Inc – M68HC16Z Series

Freescale Semiconductor, Inc.
sponding port is configured as an output, the value stored for that bit is driven out on
the pin. A read of this data register returns the value at the pin only if the pin is config-
ured as a discrete input. Otherwise, the value read is the value stored in the register.
Bits [15:8] are unimplemented and will always read zero.
D.2.10 Port F Data Direction Register
DDRF — Port F Data Direction Register
15
8
NOT USED
RESET:
$YFFA1C
7
6
5
4
3
2
1
0
DDF7 DDF6 DDF5 DDF4 DDF3 DDF2 DDF1 DDF0
0
0
0
0
0
0
0
0
This register controls the direction of the port F pin drivers when pins are configured
for I/O. Setting a bit configures the corresponding pin as an output; clearing a bit con-
figures the corresponding pin as an input. This register can be read or written at any
time. Bits [15:8] are unimplemented and will always read zero.
D.2.11 Port F Pin Assignment Register
PFPAR — Port F Pin Assignment Register
$YFFA1E
15
RESET:
NOT USED
8
7
6
5
4
3
2
1
0
PFPA7 PFPA6 PFPA5 PFPA4 PFPA3 PFPA2 PFPA1 PFPA0
DATA9 DATA9 DATA9 DATA9 DATA9 DATA9 DATA9 DATA9
This register determines the function of port F pins. Setting a bit assigns the corre-
sponding pin to a control signal; clearing a bit assigns the pin to port F. Bits [15:8] are
unimplemented and will always read zero. Refer to Table D-5.
Table D-5 Port F Pin Assignments
PFPAR Field
PFPA7
PFPA6
PFPA5
PFPA4
PFPA3
PFPA2
PFPA1
PFPA0
Port F Signal
PF7
PF6
PF5
PF4
PF3
PF2
PF1
PF0
Alternate Signal
IRQ7
IRQ6
IRQ5
IRQ4
IRQ3
IRQ2
IRQ1
MODCLK
M68HC16 Z SERIES
USER’S MANUAL
REGISTER SUMMARY
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D-11