Справочник Пользователя для Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256
Модели
DEMO9S12XHY256
Port Integration Module (S12XHYPIMV1)
MC9S12XHY-Family Reference Manual, Rev. 1.04
Freescale Semiconductor
129
2.3.66
Port R Input Register (PTIR)
1
PTR
Port R general purpose input/output data—Data Register, TIM0 channels,TX of CAN1
When not used with the alternative function, the associated pin can be used as general purpose I/O. In general
purpose output mode the register bit value is driven to the pin.
If the associated data direction bit is set to 1, a read returns the value of the port register bit, otherwise the buffered
pin input state is read.
When not used with the alternative function, the associated pin can be used as general purpose I/O. In general
purpose output mode the register bit value is driven to the pin.
If the associated data direction bit is set to 1, a read returns the value of the port register bit, otherwise the buffered
pin input state is read.
• The TX of CAN1 function takes precedence over the TIM0 and general purpose I/O function
• The TIM0 output compare function takes precedence over the general purpose I/O function
• The TIM0 output compare function takes precedence over the general purpose I/O function
2
0
PTR
Port R general purpose input/output data—Data Register, TIM0 channels,RX of CAN1
When not used with the alternative function, the associated pin can be used as general purpose I/O. In general
purpose output mode the register bit value is driven to the pin.
If the associated data direction bit is set to 1, a read returns the value of the port register bit, otherwise the buffered
pin input state is read.
When not used with the alternative function, the associated pin can be used as general purpose I/O. In general
purpose output mode the register bit value is driven to the pin.
If the associated data direction bit is set to 1, a read returns the value of the port register bit, otherwise the buffered
pin input state is read.
• The RX of CAN1 function takes precedence over the TIM0 and general purpose I/O function
• The TIM0 output compare function takes precedence over the general purpose I/O function
• The TIM0 output compare function takes precedence over the general purpose I/O function
3
1
In order TIM input capture to be function correctly, the corresponding DDRR bit should be set as input state
2
In order TIM input capture to be function correctly, the corresponding DDRR bit should be set as input state
3
In order TIM input capture to be function correctly, the corresponding DDRR bit should be set as input state
Address 0x0281
Access: User read
1
1
Read: Anytime.
Write:Never, writes to this register have no effect.
Write:Never, writes to this register have no effect.
7
6
5
4
3
2
1
0
R
PTIR7
PTIR6
PTIR5
PTIR4
PTIR3
PTIR2
PTIR1
PTIR0
W
Reset
u
u
u
u
u
u
u
u
= Unimplemented or Reserved
u = Unaffected by reset
Figure 2-63. Port R Input Register (PTIR)
Table 2-53. PTIR Register Field Descriptions
Field
Description
7-0
PTIR
Port R 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.
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.
Table 2-52. PTR Register Field Descriptions (continued)
Field
Description