MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 196

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MC68HC708AS48

Manufacturer Part Number
MC68HC708AS48
Description
Advance Information
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
Input/Output (I/O) Ports
Advance Information
196
When bit DDRCx is a logic 1, reading address $0002 reads the PTCx
data latch. When bit DDRCx is a logic 0, reading address $0002 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 C pins.
X = don’t care
Hi-Z = high impedance
1. Writing affects data register, but does not affect input.
DDRC
[7] = 0
[7] = 1
Bit
0
1
READ DDRC ($0006)
WRITE DDRC ($0006)
WRITE PTC ($0002)
READ PTC ($0002)
PTC2
PTC2
PTC
Bit
X
X
Input/Output (I/O) Ports
Output, MCLK
Table 15-3. Port C Pin Functions
Input, Hi-Z
Input, Hi-Z
Figure 15-10. Port C I/O Circuit
I/O Pin
Output
RESET
Mode
Read/Write
DDRC[5:0]
DDRC[5:0]
Accesses
to DDRC
DDRC[7]
DDRC[7]
DDRCx
PTCx
Data Latch
PTC[5:0]
MC68HC708AS48
Table 15-3
Read
Pin
0
Accesses to PTC
PTC[5:3, 1:0]
PTC[5:3, 1:0]
summarizes
MOTOROLA
PTC2
Write
Rev. 4.0
PTCx
(1)

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