MC9S12E32CFU FREESCALE [Freescale Semiconductor, Inc], MC9S12E32CFU Datasheet - Page 157
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MC9S12E32CFU
Manufacturer Part Number
MC9S12E32CFU
Description
HCS12 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC9S12E32CFU.pdf
(606 pages)
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Part Number:
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3.3.7.4
Read: Anytime. Write: Anytime.
This register configures the drive strength of configured output pins as either full or reduced. If a pin is
configured as input, the corresponding Reduced Drive Register bit has no effect.
3.3.7.5
Read: Anytime. Write: Anytime.
This register configures whether a pull-up or a pull-down device is activated on configured input pins. If
a pin is configured as output, the corresponding Pull Device Enable Register bit has no effect.
Freescale Semiconductor
RDRU[7:0]
PERU[7:0]
Reset
Reset
Field
Field
7:0
7:0
W
W
R
R
RDRU7
PERU7
Reduced Drive Port U
0 Full drive strength at output.
1 Associated pin drives at about 1/3 of the full drive strength.
Pull Device Enable Port U
0 Pull-up or pull-down device is disabled.
1 Pull-up or pull-down device is enabled.
Port U Reduced Drive Register (RDRU)
Port U Pull Device Enable Register (PERU)
0
0
7
7
RDRU6
PERU6
Figure 3-46. Port T Pull Device Enable Register (PERT)
0
0
6
6
Figure 3-45. Port U Reduced Drive Register (RDRU)
Table 3-32. RDRT Field Descriptions
Table 3-33. PERT Field Descriptions
RDRU5
PERU5
MC9S12E128 Data Sheet, Rev. 1.07
0
0
5
5
RDRU4
PERU4
0
0
4
4
Description
Description
RDRU3
PERU3
0
0
3
3
Chapter 3 Port Integration Module (PIM9E128V1)
RDRU2
PERU2
0
0
2
2
RDRU1
PERU1
0
0
1
1
RDRU0
PERU0
0
0
0
0
157
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