mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 867

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1. Read: Anytime.
1. Read: Anytime.
19.3.30 Port S Input Register (PTIS)
19.3.31 Port S Data Direction Register (DDRS)
Freescale Semiconductor
Address 0x0249
Address 0x024A
Write:Never, writes to this register have no effect.
Write: Anytime.
Field
Field
PTIS
PTS
PTS
Reset
Reset
7-0
1
0
W
W
R
R
Port S general purpose input/output data—Data Register
Port S pin 3 is associated with the TXD signal of the SCI0 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.
Port S general purpose input/output data—Data Register
Port S bits 2 is associated with the RXD signal of the SCI0 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.
Port S 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.
DDRS7
PTIS7
u
0
7
7
= Unimplemented or Reserved
DDRS6
PTIS6
Table 19-26. PTS Register Field Descriptions (continued)
u
0
6
6
Figure 19-29. Port S Data Direction Register (DDRS)
Table 19-27. PTIS Register Field Descriptions
MC9S12XF - Family Reference Manual, Rev.1.19
Figure 19-28. Port S Input Register (PTIS)
DDRS5
PTIS5
u
0
5
5
DDRS4
PTIS4
u
0
4
4
Description
Description
u = Unaffected by reset
DDRS3
PTIS3
3
u
3
0
Chapter 19 Port Integration Module (S12XFPIMV2)
DDRS2
PTIS2
u
0
2
2
Access: User read/write
Access: User read/write
DDRS1
PTIS1
u
0
1
1
DDRS0
PTIS0
u
0
0
0
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(1)
(1)