Datasheet

Chapter 2 Port Integration Module (S12XEPIMV1)
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 125
2.3.29 Port S Data Register (PTS)
Address 0x0248 Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
76543210
R
PTS7 PTST6 PTS5 PTS4 PTS3 PTS2 PTS1 PTS0
W
Altern.
Function
SS0 SCK0 MOSI0 MISO0 TXD1 RXD1 TXD0 RXD0
Reset 00000000
Figure 2-27. Port S Data Register (PTS)
Table 2-26. PTS Register Field Descriptions
Field Description
7
PTS
Port S general purpose input/output data—Data Register
Port S pin 7 is associated with the
SS signal of the SPI0 module.
When not used with the alternative function, this pin can be used as general purpose I/O.
If the associated data direction bit of this pin is set to 1, a read returns the value of the port register, otherwise the
buffered pin input state is read.
6
PTS
Port S general purpose input/output data—Data Register
Port S pin 6 is associated with the SCK signal of the SPI0 module.
When not used with the alternative function, this pin can be used as general purpose I/O.
If the associated data direction bit of this pin is set to 1, a read returns the value of the port register, otherwise the
buffered pin input state is read.
5
PTS
Port S general purpose input/output data—Data Register
Port S pin 5 is associated with the MOSI signal of the SPI0 module.
When not used with the alternative function, this pin can be used as general purpose I/O.
If the associated data direction bit of this pin is set to 1, a read returns the value of the port register, otherwise the
buffered pin input state is read.
4
PTS
Port S general purpose input/output data—Data Register
Port S pin 4 is associated with the MISO signal of the SPI0 module.
When not used with the alternative function, this pin can be used as general purpose I/O.
If the associated data direction bit of this pin is set to 1, a read returns the value of the port register, otherwise the
buffered pin input state is read.
3
PTS
Port S general purpose input/output data—Data Register
Port S pin 3 is associated with the TXD signal of the SCI1 module.
When not used with the alternative function, this pin can be used as general purpose I/O.
If the associated data direction bit of this pin is set to 1, a read returns the value of the port register, otherwise the
buffered pin input state is read.
2
PTS
Port S general purpose input/output data—Data Register
Port S bits 2 is associated with the RXD signal of the SCI1 module.
When not used with the alternative function, this pin can be used as general purpose I/O.
If the associated data direction bit of this pin is set to 1, a read returns the value of the port register, otherwise the
buffered pin input state is read.