Datasheet

Port Integration Module (S12XSPIMV1)
S12XS Family Reference Manual, Rev. 1.13
Freescale Semiconductor 95
2.3.31 Port S Polarity Select Register (PPSS)
2.3.32 Port S Wired-Or Mode Register (WOMS)
Address 0x024C Access: User read/write
1
1
Read: Anytime
Write: Anytime
76543210
R
PPSS7 PPSS6 PPSS5 PPSS4 PPSS3 PPSS2 PPSS1 PPSS0
W
Reset 00000000
Figure 2-29. Port S Polarity Select Register (PPSS)
Table 2-28. PPSS Register Field Descriptions
Field Description
7-0
PPSS
Port S pull device select—Configure pull device polarity on input pin
This bit selects a pull-up or a pull-down device if enabled on the associated port input pin.
1 A pull-down device selected
0 A pull-up device selected
Address 0x024C Access: User read/write
1
1
Read: Anytime
Write: Anytime
76543210
R
WOMS7 WOMS6 WOMS5 WOMS4 WOMS3 WOMS2 WOMS1 WOMS0
W
Reset 00000000
Figure 2-30. Port S Wired-Or Mode Register (WOMS)
Table 2-29. WOMS Register Field Descriptions
Field Description
7-0
WOMS
Port S wired-or mode—Enable open-drain functionality on output pin
This bit configures an output pin as wired-or (open-drain) or push-pull independent of the function used on the pins.
In wired-or mode a logic “0” is driven active low while a logic “1” remains undriven. This allows a multipoint
connection of several serial modules. The bit has no influence on pins used as input.
1 Output buffer operates as open-drain output.
0 Output buffer operates as push-pull output.