mc68hc08qa24 Freescale Semiconductor, Inc, mc68hc08qa24 Datasheet - Page 207

• Manufacturer Part Number: mc68hc08qa24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC08QA24
Freescale Semiconductor
When bit DDRFx is a logic 1, reading address $0009 reads the PTFx
data latch. When bit DDRFx is a logic 0, reading address $0009 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.
X = don’t care
Hi-Z = high impedance
1. Writing affects data register, but does not affect input.
DDRF
Bit
0
1
READ DDRF ($000D)
WRITE DDRF ($000D)
WRITE PTF ($0009)
READ PTF ($0009)
Input/Output (I/O) Ports
PTF
Bit
X
X
Table 16-6. Port F Pin Functions
Figure 16-19. Port F I/O Circuit
RESET
Input, Hi-Z
I/O Pin
Output
Mode
DDRFx
PTFx
Read/Write
DDRF[3:0]
DDRF[3:0]
Accesses
to DDRF
Table 16-6
PTF[3:0]
Read
Accesses to PTF
Pin
Input/Output (I/O) Ports
summarizes
Technical Data
PTF[3:0]
PTF[3:0]
Write
PTFx
205
(1)