Port Integration Module (S12XHYPIMV1)
MC9S12XHY-Family Reference Manual, Rev. 1.01
138
Freescale Semiconductor
2.3.82
Port U Input Register (PTIU)
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.
• 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.
6,4,2,0
PTU
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 enabled
1
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.
Address 0x0291
Access: User read
1
1
Read: Anytime.
Write:Never, writes to this register have no effect.
7
6
5
4
3
2
1
0
R
PTIU7
PTIU6
PTIU5
PTIU4
PTIU3
PTIU2
PTIU1
PTIU0
W
Reset
u
u
u
u
u
u
u
u
= Unimplemented or Reserved
u = Unaffected by reset
Figure 2-79. Port U Input Register (PTIU)
Table 2-67. PTIU Register Field Descriptions
Field
Description
7-0
PTIU
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.
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