SPMCK16Z4MPV20 datasheet(385/500 Pages) FREESCALE

385 / 500 page

M68HC16 Z SERIES

USER’S MANUAL

D-11

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

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

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.

DDRF — Port F Data Direction Register

$YFFA1C

NOT USED

DDF7

DDF6

DDF5

DDF4

DDF3

DDF2

DDF1

DDF0

RESET:

PFPAR — Port F Pin Assignment Register

$YFFA1E

NOT USED

PFPA7

PFPA6

PFPA5

PFPA4

PFPA3

PFPA2

PFPA1

PFPA0

RESET:

DATA9

Table D-5 Port F Pin Assignments

PFPAR Field

Port F Signal

Alternate Signal

PFPA7

PF7

IRQ7

PFPA6

PF6

IRQ6

PFPA5

PF5

IRQ5

PFPA4

PF4

IRQ4

PFPA3

PF3

IRQ3

PFPA2

PF2

IRQ2

PFPA1

PF1

IRQ1

PFPA0

PF0

MODCLK

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