CSM9S12XDT512SLK Freescale Semiconductor, CSM9S12XDT512SLK Datasheet - Page 939

• Manufacturer Part Number: CSM9S12XDT512SLK
• Description: KIT STUDENT LEARNING 16BIT
• Manufacturer: Freescale Semiconductor

Specifications of CSM9S12XDT512SLK

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WOMM[7:0]
PPSM[7:0]
Reset
Reset
23.0.5.35 Port M Polarity Select Register (PPSM)
Read: Anytime.
Write: Anytime.
This register selects whether a pull-down or a pull-up device is connected to the pin. If CAN is
active, a pull-up device can be activated on the related RXCAN inputs, but not a pull-down.
Field
23.0.5.36 Port M Wired-OR Mode Register (WOMM)
Read: Anytime.
Write: Anytime.
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. It applies also to the CAN outputs and allows a
multipoint connection of several serial modules. This bit has no influence on pins used as inputs.
Field
7–0
7–0
W
W
R
R
WOMM7
PPSM7
Pull Select Port M
0 A pull-up device is connected to the associated port M pin, if enabled by the associated bit in register PERM
1 A pull-down device is connected to the associated port M pin, if enabled by the associated bit in register PERM
Wired-OR Mode Port M
0 Output buffers operate as push-pull outputs.
1 Output buffers operate as open-drain outputs.
7
0
7
0
and if the port is used as general purpose or RXCAN input.
and if the port is used as a general purpose but not as RXCAN.
WOMM6
PPSM6
Figure 23-38. Port M Wired-OR Mode Register (WOMM)
0
0
6
6
Figure 23-37. Port M Polarity Select Register (PPSM)
Table 23-37. WOMM Field Descriptions
Table 23-36. PPSM Field Descriptions
WOMM5
PPSM5
5
0
5
0
WOMM4
PPSM4
0
0
4
4
Description
Description
WOMM3
PPSM3
3
0
3
0
WOMM2
PPSM2
0
0
2
2
WOMM1
PPSM1
1
0
1
0
WOMM0
PPSM0
0
0
0
0