mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 151

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

3.3.6
Port T is associated with two 4-channel timers (TIM0 and TIM1). Each pin is assigned to these modules
according to the following priority: TIM1/TIM0 > general-purpose I/O.
If the timer TIM0 is enabled, the channels configured for output compare are available on port T pins
PT[3:0]. If the timer TIM1 is enabled, the channels configured for output compare are available on port T
pins PT[7:4].
Refer to
module.
During reset, port T pins are configured as high-impedance inputs.
3.3.6.1
Read: Anytime. Write: Anytime.
If the associated data direction bit (DDRTx) is set to 1 (output), a read returns the value of the I/O register
bit. If the associated data direction bit (DDRTx) is set to 0 (input), a read returns the value of the pin.
3.3.6.2
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
TIM:
W
W
R
R
Chapter 13, “Timer Module (TIM16B4CV1)”
PTIT7
Port T
PTT7
OC17
Port T I/O Register (PTT)
Port T Input Register (PTIT)
0
u
7
7
= Reserved or Unimplemented
PTIT6
PTT6
OC16
0
u
6
6
Figure 3-37. Port T Input Register (PTIT)
Figure 3-36. Port T I/O Register (PTT)
PTIT5
PTT5
OC15
MC9S12E256 Data Sheet, Rev. 1.08
0
u
5
5
PTIT4
PTT4
OC14
0
u
4
4
for information on enabling and disabling the TIM
u = Unaffected by reset
PTIT3
PTT3
OC07
3
0
3
u
Chapter 3 Port Integration Module (PIM9E256V1)
PTIT2
PTT2
OC06
0
u
2
2
PTIT1
PTT1
OC05
0
u
1
1
PTIT0
PTT0
OC04
0
u
0
0
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