mc68331cpv20b1 Freescale Semiconductor, Inc, mc68331cpv20b1 Datasheet - Page 226

• Manufacturer Part Number: mc68331cpv20b1
• Description: Mc68331 32 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

D
D.3.9 PORTF0/PORTF1 — Port F Data Register
D.3.10 DDRF — Port F Data Direction Register
D.3.11 PFPAR — Port F Pin Assignment Register
D-18
15
RESET:
15
15
PORTF is an internal data latch that can be accessed at two locations. It can be read
or written at any time. If a pin in I/O port F is configured as an output, the corresponding
bit value is driven out on the pin. When a pin is configured for output, a read of PORTF
returns the latched bit value; when a pin is configured for input, a read returns the pin
logic level.
Bits in this register control the direction of the port F pin drivers when pins are config-
ured for I/O. Setting a bit configures the corresponding pin as an output; clearing a bit
configures the corresponding pin as an input. This register can be read or written at
any time.
Bits in this register determine the function of port F pins. Setting a bit assigns the cor-
responding pin to a control signal; clearing a bit assigns the pin to port F.
RESET:
RESET:
NOT USED
NOT USED
NOT USED
PEPAR Bit
Freescale Semiconductor, Inc.
PEPA7
PEPA6
PEPA5
PEPA4
PEPA3
PEPA2
PEPA1
PEPA0
For More Information On This Product,
Table D-4 Port E Pin Assignments
8
Go to: www.freescale.com
REGISTER SUMMARY
PFPA7
DATA9
7
Port E Signal
PE7
PE6
PE5
PE4
PE3
PE2
PE1
PE0
8
8
PFPA6
DATA9
6
DDF7
PF7
7
U
7
0
DATA9
PFPA5
5
DDF6
PF6
Bus Control Signal
U
6
6
0
PFPA4
DATA9
DSACK1
DSACK0
DDF5
PF5
4
AVEC
U
RMC
5
5
0
SIZ1
SIZ0
AS
DS
DDF4
PFPA3
DATA9
PF4
U
4
4
0
3
$YFFA19, $YFFA1B
DDF3
PF3
U
3
3
0
PFPA2
DATA9
2
DDF2
USER’S MANUAL
PF2
U
2
2
0
DATA9
PFPA1
1
$YFFA1D
DDF1
$YFFA1F
PF1
U
1
1
0
MC68331
DATA9
PFPA0
DDF0
PF0
0
0
U
0
0