mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1016

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 24 DG128 Port Integration Module (S12XDG128PIMV2)
24.0.5.42 Port H Data Register (PTH)
Read: Anytime.
Write: Anytime.
Port H pins 7–0 are associated with the routed SPI1.
These pins can be used as general purpose I/O when not used with any of the peripherals.
If the data direction bits of the associated I/O pins are set to logic level “1”, a read returns the value of the
port register, otherwise the buffered pin input state is read.
The routed SPI1 function takes precedence over the general purpose I/O function if the routed SPI1 is
enabled. Refer to SPI section for details.
24.0.5.43 Port H Input Register (PTIH)
Read: Anytime.
Write: Never, writes to this register have no effect.
1016
Routed
PIFP[7:0]
Reset
Reset
Field
1. These registers are reset to zero. Two bus clock cycles after reset release the register values are updated with the
7–0
SPI
W
W
associated pin values.
R
R
1
PTIH7
PTH7
Interrupt Flags Port P
0 No active edge pending. Writing a “0” has no effect.
1 Active edge on the associated bit has occurred (an interrupt will occur if the associated enable bit is set).
—
0
7
7
Writing a logic level “1” clears the associated flag.
= Unimplemented or Reserved
PTIH6
PTH6
—
0
6
6
Figure 24-45. Port H Input Register (PTIH)
Figure 24-44. Port H Data Register (PTH)
Table 24-40. PIFP Field Descriptions
MC9S12XDP512 Data Sheet, Rev. 2.17
PTIH5
PTH5
—
0
5
5
PTIH4
PTH4
—
0
4
4
Description
PTIH3
PTH3
SS1
—
0
3
3
PTIH2
SCK1
PTH2
—
0
2
2
Freescale Semiconductor
MOSI1
PTIH1
PTH1
—
0
1
1
MISO1
PTIH0
PTH0
—
0
0
0