Freescale Semiconductor MC68HC08KH12 manual Port F, 202

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.

Address:

Read:

Write:

Reset:

Alternate Function:

$0009
Bit 7	6	5	4	3	2	1	Bit 0
PTF7	PTF6	PTF5	PTF4	PTF3	PTF2	PTF1	PTF0
			Unaffected by reset
KBF7	KBF6	KBF5	KBF4	KBF3	KBF2	KBF1	KBF0

Figure 12-19. Port F Data Register (PTF)

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-FPull-up Enable Register.)

Advance Information	MC68HC(7)08KH12 — Rev. 1.1
202	Freescale Semiconductor