LFDAS12XSCT Freescale Semiconductor, LFDAS12XSCT Datasheet - Page 99
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LFDAS12XSCT
Manufacturer Part Number
LFDAS12XSCT
Description
HARDWARE MC9S12XS 48-PIN
Manufacturer
Freescale Semiconductor
Datasheet
1.LFDAS12XSCT.pdf
(738 pages)
Specifications of LFDAS12XSCT
Module/board Type
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
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1
2.3.37
Freescale Semiconductor
Address 0x0253
Read: Anytime.
Write: Anytime.
DDRM
DDRM
DDRM
DDRM
RDRM
Field
Field
Reset
7-6
5-2
7-0
1
0
W
R
Port M data direction—
This bit determines whether the associated pin is an input or output.
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 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.
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
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
RDRM7
Port M Reduced Drive Register (RDRM)
0
7
RDRM6
0
6
Figure 2-35. Port M Reduced Drive Register (RDRM)
Table 2-32. DDRM Register Field Descriptions
Table 2-33. RDRM Register Field Descriptions
S12XS Family Reference Manual, Rev. 1.11
RDRM5
0
5
RDRM4
0
4
Description
Description
RDRM3
3
0
RDRM2
0
Port Integration Module (S12XSPIMV1)
2
RDRM1
Access: User read/write
0
1
RDRM0
0
0
99
1
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