Freescale Semiconductor MC68HC08KH12 - Manual (Page 202)

Advance Information MC68HC(7)08KH12 — Rev. 1.1
202 Freescale Semiconductor
12.8 Port F
Port F is an 8-bit general-purpose bidirectional I/O port that shares its
pins with the keyboard interrupt module (KBI). All Port F pins have built-
in schmitt triggered input and software configurable pull-up.
12.8.1 Port F Data Register (PTF)
The port F data register contains a data latch for each of the eight port F
pins.
PTF[7:0] — Port F Data Bits
These read/write bits are software programmable. Data direction of
each port F pin is under the control of the corresponding bit in data
direction register F. Reset has no effect on port F data.
The port-F keyboard interrupt enable bits, KBFIE7—KBFIE0, in the
port-F keyboard interrupt enable register (KBFIER), enable the port F
pins as external interrupt pins.
See Section 15. Keyboard Interrupt
Module (KBI) .
The PFPE[7:0] bits in the port F keyboard pull-up enable register enable
individual pull-ups on port F pins if the respective pin is configured as an
input.
(See 15.6.3.3 Port-F Pull-up Enable Register .)
Address: $0009
Bit 7 6 5 4 3 2 1 Bit 0
Read:
PTF7 PTF6 PTF5 PTF4 PTF3 PTF2 PTF1 PTF0
Write:
Reset: Unaffected by reset
Alternate
Function:
KBF7 KBF6 KBF5 KBF4 KBF3 KBF2 KBF1 KBF0
Figure 12-19. Port F Data Register (PTF)