S912XHY128F0VLM Datasheet, PDF (138/802 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Port Integration Module (S12XHYPIMV1)
Table 2-66. 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 SSD takes precedence over the Motor Driver and general purpose I/O function
• 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 SSD takes precedence over the Motor Driver and and TIM0 and general purpose I/O function
• 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, the corresponding DDRU bit shoud be set to 0. Also the corresponding SRRU}
bit should be set to 0.
2.3.82 Port U Input Register (PTIU)
Address 0x0291
7
R PTIU7
6
PTIU6
5
PTIU5
4
PTIU4
3
PTIU3
2
PTIU2
W
Reset
u
u
u
u
u
u
= Unimplemented or Reserved
u = Unaffected by reset
Figure 2-79. Port U Input Register (PTIU)
1 _{Read: Anytime.}
Write:Never, writes to this register have no effect.
Access: User read¹
1
PTIU1
0
PTIU0
u
u
Field
7-0
PTIU
Table 2-67. PTIU Register Field Descriptions
Description
Port U input data—
This register always reads back the buffered state of the associated pins. This can also be used to detect overload
or short circuit conditions on output pins.
MC9S12XHY-Family Reference Manual, Rev. 1.01
138
Freescale Semiconductor