mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 96

• Manufacturer Part Number: mc9s12xs128
• Description: Hcs12 Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1
1
Port Integration Module (S12XSPIMV1)
2.3.33
2.3.34
96
Function
Address 0x024F
Address 0x0250
Read: Always reads 0x00
Write: Unimplemented
Read: Anytime. The data source depends on the data direction value.
Write: Anytime.
Altern.
Field
PTM
PTM
Reset
Reset
7-6
5
W
W
R
R
Port M general purpose input/output data—Data Register
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.
Port M general purpose input/output data—Data Register, routed SPI0 SCK input/output
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 SPI0 function takes precedence over the general purpose I/O function if enabled.
PTM7
PIM Reserved Register
Port M Data Register (PTM)
—
—
0
0
0
7
7
= Unimplemented or Reserved
PTM6
—
—
0
0
0
6
6
Table 2-30. PTM Register Field Descriptions
Figure 2-32. Port M Data Register (PTM)
S12XS Family Reference Manual, Rev. 1.10
Figure 2-31. PIM Reserved Register
(SCK0)
PTM5
—
0
0
0
5
5
(MOSI0)
PTM4
—
0
0
0
4
4
Description
u = Unaffected by reset
PTM3
(SS0)
—
3
0
0
3
0
(MISO0)
PTM2
—
0
0
0
2
2
TXCAN0
Freescale Semiconductor
(TXD1)
Access: User read/write
PTM1
0
0
0
1
1
Access: User read
RXCAN0
(RXD1)
PTM0
0
0
0
0
0
1
1