mc68hc708mp16 Freescale Semiconductor, Inc, mc68hc708mp16 Datasheet - Page 332

• Manufacturer Part Number: mc68hc708mp16
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Input/Output (I/O) Ports
Technical Data
332
When bit DDRFx is a logic 1, reading address $0005 reads the PTFx
data latch. When bit DDRFx is a logic 0, reading address $0005 reads
the voltage level on the pin. The data latch can always be written,
regardless of the state of its data direction bit.
the operation of the port F pins.
1. X = don’t care
2. Hi-Z = high impedance
3. Writing affects data register, but does not affect input.
DDRF
Bit
0
1
READ DDRF ($000B)
WRITE DDRF ($000B)
WRITE PTF ($0005)
READ PTF ($0005)
PTF
X
Bit
X
(1)
Input/Output (I/O) Ports
I/O Pin Mode
Input, Hi-Z
Table 15-6. Port F Pin Functions
Figure 15-18. Port F I/O Circuit
RESET
Output
(2)
DDRFx
Accesses to
PTFx
Read/Write
DDRF[6:0]
DDRF[6:0]
DDRF
MC68HC708MP16
Table 15-3
PTF[6:0]
Freescale Semiconductor
Read
Pin
Accesses to PTF
summarizes
PTF[6:0]
PTF[6:0]
Write
—
Rev. 3.1
PTFx
(3)