mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 269
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mc68hc908jb16
Manufacturer Part Number
mc68hc908jb16
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908JB16.pdf
(332 pages)
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14.4 Port C
14.4.1 Port C Data Register
MC68HC908JB16
Freescale Semiconductor
—
Rev. 1.1
Additional
Alternative
Function:
Function:
Address:
Port C is a 2-bit special function port that shares its pins with the serial
communications interface (SCI) module. These pins have software
configurable pullups.
The port C data register contains a data latch for each of the two
port C pins.
PTC[1:0] — Port C Data Bits
TxD, RxD — SCI Data I/O Pins
Reset:
Read:
Write:
These read/write bits are software-programmable. Data direction of
each port C pin is under the control of the corresponding bit in data
direction register C. Reset has no effect on port C data.
The port C pullup enable bit, PCP, in the port option control register
(POCR) enables pullups on PTC[1:0] if the respective pin is
configured as an input. (See
The TxD and RxD pins are the transmit data output and receive data
input for the SCI module. The SCI enable bit, ENSCI, in the SCI
control register 1 enables the PTC0/TxD and PTC1/RxD pins as SCI
TxD and RxD pins and overrides any control from the port I/O. See
Section 12. Serial Communications Interface Module
$0002
Bit 7
0
Figure 14-5. Port C Data Register (PTC)
Input/Output (I/O) Ports
6
0
5
0
14.7 Port
Unaffected by reset
4
0
Options.)
3
0
2
0
Input/Output (I/O) Ports
Optional
pullup
PTC1
RxD
1
Technical Data
(SCI).
Optional
pullup
PTC0
Bit 0
TxD
269
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