MC9S12Q128_10 Datasheet, PDF (96/644 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Chapter 2 Port Integration Module (PIM9C32) Block Description
2.3.2.5 Port J Registers
2.3.2.5.1 Port J I/O Register (PTJ)
Module Base + 0x0028
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
PTJ7
PTJ6
W
Reset
0
0
—
—
—
—
—
—
= Unimplemented or Reserved
Figure 2-32. Port J I/O Register (PTJ)
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 Port J Input Register (PTIJ)
Module Base + 0x0029
7
6
5
4
3
2
1
0
R PTIJ7
PTIJ6
0
0
0
0
0
0
W
Reset
0
0
—
—
—
—
—
—
= Unimplemented or Reserved
Figure 2-33. Port J Input Register (PTIJ)
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
MC9S12Q128
Freescale Semiconductor
Rev 1.10