mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 132

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 3 Port Integration Module (PIM9E256V1)
3.3.1.4
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.
3.3.1.5
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.
132
PERAD[15:0]
RDRAD[15:0]
Reset
Reset
Reset
Reset
Field
Field
15:0
15:0
W
W
W
W
R
R
R
R
RDRAD15
PERAD15
RDRAD7
PERAD7
Pull Device Enable Port AD
0 Pull-up or pull-down device is disabled.
1 Pull-up or pull-down device is enabled.
Port AD Reduced Drive Register (RDRAD)
Port AD Pull Device Enable Register (PERAD)
Reduced Drive Port AD
0 Full drive strength at output.
1 Associated pin drives at about 1/3 of the full drive strength.
0
0
0
0
7
7
7
7
RDRAD14
PERAD14
RDRAD6
PERAD6
Figure 3-6. Port AD Pull Device Enable Register (PERAD)
0
0
0
0
6
6
6
6
Figure 3-5. Port AD Reduced Drive Register (RDRAD)
RDRAD13
Table 3-4. RDRAD Field Descriptions
PERAD13
Table 3-5. PERAD Field Descriptions
RDRAD5
PERAD5
MC9S12E256 Data Sheet, Rev. 1.08
0
0
0
0
5
5
5
5
RDRAD12
PERAD12
RDRAD4
PERAD4
0
0
0
0
4
4
4
4
Description
Description
RDRAD11
PERAD11
RDRAD3
PERAD3
3
0
3
0
3
0
3
0
RDRAD10
PERAD10
RDRAD2
PERAD2
0
0
0
0
2
2
2
2
RDRAD9
RDRAD1
PERAD9
PERAD1
Freescale Semiconductor
0
0
0
0
1
1
1
1
RDRAD8
RDRAD0
PERAD8
PERAD0
0
0
0
0
0
0
0
0