S9S12XS256J0CAL Datasheet, PDF (99/738 Pages) Freescale Semiconductor, Inc – Microcontrollers

Port Integration Module (S12XSPIMV1)
Table 2-32. DDRM Register Field Descriptions
Field
7-6
DDRM
Description
Port M data direction—
This bit determines whether the associated pin is an input or output.
5-2
DDRM
1 Associated pin configured as output
0 Associated pin configured as input
Port M data direction—
This bit determines whether the associated pin is an input or output.
Depending on the configuration of the enabled SPI0 the I/O state will be forced to be input or output. In this case the
data direction bit will not change.
1
DDRM
1 Associated pin configured as output
0 Associated pin configured as input
Port M data direction—
This bit determines whether the associated pin is an input or output.
The enabled CAN0 or SCI1 forces the I/O state to be an output. In this case the data direction bit will not change.
0
DDRM
1 Associated pin configured as output
0 Associated pin configured as input
Port M data direction—
This bit determines whether the associated pin is an input or output.
The enabled CAN0 or SCI1 forces the I/O state to be an input. In this case the data direction bit will not change.
1 Associated pin configured as output
0 Associated pin configured as input
2.3.37 Port M Reduced Drive Register (RDRM)
Address 0x0253
R
W
Reset
7
RDRM7
0
1 _{Read: Anytime}
Write: Anytime
6
RDRM6
5
RDRM5
4
RDRM4
3
RDRM3
2
RDRM2
0
0
0
0
0
Figure 2-35. Port M Reduced Drive Register (RDRM)
Access: User read/write¹
1
0
RDRM1
RDRM0
0
0
Table 2-33. RDRM Register Field Descriptions
Field
Description
7-0
RDRM
Port M reduced drive—Select reduced drive for output pin
This bit configures the drive strength of the associated output pin as either full or reduced. If a pin is used as input
this bit has no effect. The reduced drive function is independent of which function is being used on a particular pin.
1 Reduced drive selected (approx. 1/5 of the full drive strength)
0 Full drive strength enabled
S12XS Family Reference Manual, Rev. 1.13
Freescale Semiconductor
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