MC9S12Q FREESCALE [Freescale Semiconductor, Inc], MC9S12Q Datasheet - Page 96
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MC9S12Q
Manufacturer Part Number
MC9S12Q
Description
Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC9S12Q.pdf
(644 pages)
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Chapter 2 Port Integration Module (PIM9C32) Block Description
2.3.2.5
2.3.2.5.1
Read: Anytime.
Write: Anytime.
If the data direction bits of the associated I/O pins are set to 1, a read returns the value of the port register,
otherwise the value at the pins is read.
2.3.2.5.2
Read: Anytime.
Write: Never, writes to this register have no effect.
This register always reads back the status of the associated pins. This can be used to detect overload or
short circuit conditions on output pins.
96
Module Base + 0x0028
Module Base + 0x0029
Reset
Reset
W
W
R
R
PTIJ7
PTJ7
Port J Registers
0
0
7
7
Port J I/O Register (PTJ)
Port J Input Register (PTIJ)
= Unimplemented or Reserved
= Unimplemented or Reserved
PTIJ6
PTJ6
0
0
6
6
Figure 2-33. Port J Input Register (PTIJ)
Figure 2-32. Port J I/O Register (PTJ)
—
—
0
0
5
5
MC9S12Q128
Rev 1.09
—
—
0
0
4
4
—
—
0
0
3
3
—
—
0
0
2
2
Freescale Semiconductor
—
—
0
0
1
1
—
—
0
0
0
0
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