MC9S12E32CFU FREESCALE [Freescale Semiconductor, Inc], MC9S12E32CFU Datasheet - Page 145

• Manufacturer Part Number: MC9S12E32CFU
• Description: HCS12 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

3.3.4
Port Q is associated with the Pulse Width Modulator (PMF) modules. Each pin is assigned according to
the following priority: PMF > general-purpose I/O.
When a current status or fault function is enabled, the corresponding pin becomes an input. PQ[3:0] are
connected to FAULT[3:0] inputs and PQ[6:4] are connected to IS[2:0] inputs of the PMF module. Refer
to the PMF block description chapter for information on enabling and disabling these PMF functions.
During reset, port Q pins are configured as high-impedance inputs.
3.3.4.1
Read: Anytime. Write: Anytime.
If the associated data direction bit (DDRQx) is set to 1 (output), a read returns the value of the I/O register
bit. If the associated data direction bit (DDRQx) is set to 0 (input), a read returns the value of the pin.
3.3.4.2
Read: Anytime. Write: Never, writes to this register have no effect.
This register always reads back the status of the associated pins.
Freescale Semiconductor
Reset
Reset
PMF:
W
W
R
R
Port Q
Port Q I/O Register (PTQ)
Port Q Input Register (PTIQ)
0
0
0
0
7
7
= Reserved or Unimplemented
= Reserved or Unimplemented
PTIQ6
PTQ5
IS2
0
u
6
6
Figure 3-24. Port Q Input Register (PTIQ)
Figure 3-23. Port Q I/O Register (PTQ)
PTIQ5
PTQ5
MC9S12E128 Data Sheet, Rev. 1.07
IS1
0
u
5
5
PTIQ4
PTQ4
IS0
0
u
4
4
u = Unaffected by reset
FAULT3
PTIQ3
PTQ3
0
u
3
3
Chapter 3 Port Integration Module (PIM9E128V1)
FAULT2
PTIQ2
PTQ2
0
u
2
2
FAULT1
PTIQ1
PTQ1
0
u
1
1
FAULT0
PTIQ0
PTQ0
0
u
0
0
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