MC9S12HY64 Datasheet, PDF (116/792 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Port Integration Module (S12HYPIMV1)
Field
3-0
PIFR
Table 2-61. PIFR Register Field Descriptions
Description
Port R interrupt flag—
Each flag is set by an active edge on the associated input pin. This could be a rising or a falling edge based on the
state of the PPSR register. To clear this flag, write logic level 1 to the corresponding bit in the PIFR register. Writing
a 0 has no effect.
1 Active edge on the associated bit has occurred (an interrupt will occur if the associated enable bit is set).
0 No active edge pending.
2.3.73 Port U Data Register (PTU)
Address 0x0290
R
W
Altern.
Function
Reset
7
PTU7
—
M1C1P
0
1 _{Read: Anytime.}
Write: Anytime.
6
PTU6
5
PTU5
4
PTU4
3
PTU3
2
PTU2
IOC0_3
—
IOC0_2
—
IOC0_1
M1C1M
M1C0P
M1C0M
M0C1P
M0C1M
0
0
0
0
0
Figure 2-71. Port U Data Register (PTU)
Access: User read/write¹
1
0
PTU1
PTU0
—
M0C0P
0
IOC0_0
M0C0M
0
Table 2-62. PTU Register Field Descriptions
Field
Description
7,5,3,1
PTU
Port U general purpose input/output data—Data Register, Motor driver PWM output
Port U 7,5,3,1 pins are associated with the Motor PWM output.
When not used with the alternative functions, these pins can be used as general purpose I/O. If the associated data
direction bits of these pins are set to 1, a read returns the value of the port register, otherwise the buffered pin input
state is read.
6,4,2,0
PTU
• The Motor driver PWM takes precedence over the general purpose I/O function.
Port U general purpose input/output data—Data Register, Motor driver PWM output, TIM0 channels 3-0
Port U 6,4,2,0 pins are associated with the Motor PWM output and TIM0 channels 3-0
When not used with the alternative functions, these pins can be used as general purpose I/O. If the associated data
direction bits of these pins are set to 1, a read returns the value of the port register, otherwise the buffered pin input
state is read.
• The Motor driver PWM takes precedence over the TIM0 and the general purpose I/O function.
• The TIM0 output function takes precedence over the general purpose I/O function if related channel is enabled¹
1 _{In order TIM input capture to be function correctly, all the output function on the corresponding port shoud be set to 0. Also the}
corresponding SRRU bit should be set to 0.
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
116
Freescale Semiconductor