LFEBS12UB Freescale Semiconductor, LFEBS12UB Datasheet - Page 139

• Manufacturer Part Number: LFEBS12UB
• Description: KIT STUDENT LEARNING S12 DG128
• Manufacturer: Freescale Semiconductor

Specifications of LFEBS12UB

• Architecture: 8/16-bit
• Code Gen Tools Included: Code Warrior
• Silicon Manufacturer: Freescale
• Core Architecture: S12
• Core Sub-architecture: S12
• Silicon Core Number: MC9S12
• Silicon Family Name: S12D
• Kit Contents: HCS12 DG128 Learning Kit
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1. Read: Anytime.
1. Read: Anytime.
2.3.42
2.3.43
Freescale Semiconductor
Address 0x0255
Address 0x0256
WOMM
Write: Anytime.
Write: Anytime.
PPSM
Field
Field
Reset
Reset
7-0
7-0
W
W
R
R
Port M pull device select—Determine pull device polarity on input pins
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 RXCAN[3:0] inputs, but not a pull-down.
1 A pull-down device is connected to the associated Port M pin, if enabled by the associated bit in register PERM
0 A pull-up device is connected to the associated Port M pin, if enabled by the associated bit in register PERM and
Port M wired-or mode—Enable wired-or functionality
This register configures the output pins as wired-or independent of the function used on the pins. 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.
WOMM7
PPSM7
Port M Polarity Select Register (PPSM)
Port M Wired-Or Mode Register (WOMM)
and if the port is used as a general purpose but not as RXCAN.
if the port is used as general purpose or RXCAN input.
0
0
7
7
WOMM6
PPSM6
0
0
6
6
Figure 2-41. Port M Wired-Or Mode Register (WOMM)
Figure 2-40. Port M Polarity Select Register (PPSM)
Table 2-39. WOMM Register Field Descriptions
Table 2-38. PPSM Register Field Descriptions
MC9S12XE-Family Reference Manual , Rev. 1.23
WOMM5
PPSM5
0
0
5
5
WOMM4
PPSM4
0
0
4
4
Description
Description
WOMM3
PPSM3
3
0
3
0
Chapter 2 Port Integration Module (S12XEPIMV1)
WOMM2
PPSM2
0
0
2
2
Access: User read/write
Access: User read/write
WOMM1
PPSM1
0
0
1
1
WOMM0
PPSM0
0
0
0
0
139
(1)
(1)