MC9S12HY64 Datasheet, PDF (101/792 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

2.3.44 Port H Polarity Select Register (PPSH)
Port Integration Module (S12HYPIMV1)
Address 0x0265
R
W
Reset
7
PPSH7
1
1 _{Read: Anytime.}
Write: Anytime.
6
PPSH6
5
PPSH5
4
PPSH4
3
PPSH3
2
PPSH2
1
1
1
1
1
Figure 2-42. Port H Polarity Select Register (PPSH)
Access: User read/write¹
1
0
PPSH1
PPSH0
1
1
Table 2-41. PPSH Register Field Descriptions
Field
7-0
PPSH
Description
Port H pull device select—Determine pull device polarity on input pins
This register decide if a pull-up or pull-down device if enabled.
1 A pull-down device is connected to the associated Port H pin, if enabled by the associated bit in register PERH
and if the port is used as input.
0 A pull-up device is connected to the associated Port H pin, if enabled by the associated bit in register PERH and
if the port is used as input.
2.3.45 Port H Wired-Or Mode Register (WOMH)
Address 0x0266
R
W
Reset
7
WOMH7
0
1 _{Read: Anytime.}
Write: Anytime.
6
WOMH6
5
WOMH5
4
WOMH4
3
WOMH3
2
WOMH2
0
0
0
0
0
Figure 2-43. Port H Wired-Or Mode Register (WOMH)
Access: User read/write¹
1
0
WOMH1
WOMH0
0
0
Table 2-42. WOMS Register Field Descriptions
Field
Description
7-0
WOMH
Port H wired-or mode—Enable wired-or functionality
This register configures the output pins as wired-or. If enabled the output is driven active low only (open-drain). A
logic level of “1” is not driven.This allows a multipoint connection of several serial modules. These bits have no
influence on pins used as inputs.
1 Output buffers operate as open-drain outputs.
0 Output buffers operate as push-pull outputs.
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
Freescale Semiconductor
101