MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 207

• Manufacturer Part Number: MC68HC708AS48
• Description: Advance Information
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

MC68HC708AS48
MOTOROLA
—
Rev. 4.0
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 15-6. Port F Pin Functions
Figure 15-19. Port F I/O Circuit
RESET
Input, Hi-Z
I/O Pin
Output
Mode
DDRFx
PTFx
Read/Write
DDRF[4:0]
DDRF[4:0]
Accesses
to DDRF
Table 15-6
PTF[3:0]
Read
Accesses to PTF
Pin
Input/Output (I/O) Ports
Advance Information
summarizes
PTF[4:0]
PTF[4:0]
Write
Port F
PTFx
(1)
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