SC9S12XS256J1MAA FREESCALE [Freescale Semiconductor, Inc], SC9S12XS256J1MAA Datasheet - Page 99
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SC9S12XS256J1MAA
Manufacturer Part Number
SC9S12XS256J1MAA
Description
HCS12 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.SC9S12XS256J1MAA.pdf
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1
1
2.3.40
2.3.41
This register configures the re-routing of SCI1 and SPI0 on alternative ports.
Freescale Semiconductor
Address 0x0256
Address 0x0257
Routing
WOMM
Read: Anytime.
Write: Anytime.
Read: Anytime.
Write: Anytime.
Option
Field
Reset
Reset
7-0
W
W
R
R
MODRR7
Port M wired-or mode—Enable open-drain functionality on output pin
This bit configures an output pin as wired-or (open-drain) or push-pull. 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.
WOMM7
Port M Wired-Or Mode Register (WOMM)
Module Routing Register (MODRR)
SCI1
0
0
7
7
= Unimplemented or Reserved
MODRR6
WOMM6
SCI1
0
0
6
6
Figure 2-38. Port M Wired-Or Mode Register (WOMM)
MODRRx
7
Figure 2-39. Module Routing Register (MODRR)
Table 2-36. WOMM Register Field Descriptions
6
S12XS Family Reference Manual, Rev. 1.09
WOMM5
—
0
0
0
5
5
Table 2-37. SCI1 Routing
TXD
MODRR4
WOMM4
SPI0
0
0
4
4
Related Pins
Description
WOMM3
—
3
0
3
0
0
RXD
WOMM2
—
0
0
0
Port Integration Module (S12XSPIMV1)
2
2
WOMM1
Access: User read/write
Access: User read/write
—
0
0
0
1
1
WOMM0
—
0
0
0
0
0
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1
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