Chapter 6 Parallel Input/Output Control

6.7.4.4Port D Slew Rate Enable Register (PTDSE)

R

W

Reset:

7

6

5

4

3

2

1

0

PTDSE7

PTDSE6

PTDSE5

PTDSE4

PTDSE3

PTDSE2

PTDSE1

PTDSE0

 

 

 

 

 

 

 

 

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

 

Figure 6-25. Slew Rate Enable for Port D Register (PTDSE)

 

 

Table 6-22. PTDSE Register Field Descriptions

 

 

 

Field

 

Description

 

 

7–0

Output Slew Rate Enable for Port D Bits. Each of these control bits determines if the output slew rate control is

PTDSEn

enabled for the associated PTD pin. For port D pins configured as inputs, these bits have no effect.

 

0

Output slew rate control disabled for port D bit n.

 

1

Output slew rate control enabled for port D bit n.

 

 

 

6.7.4.5Port D Drive Strength Selection Register (PTDDS)

R

W

Reset:

7

6

5

4

3

2

1

0

PTDDS7

PTDDS6

PTDDS5

PTDDS4

PTDDS3

PTDDS2

PTDDS1

PTDDS0

 

 

 

 

 

 

 

 

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

 

Figure 6-26. Drive Strength Selection for Port D Register (PTDDS)

 

 

Table 6-23. PTDDS Register Field Descriptions

 

 

 

Field

 

Description

 

 

7–0

Output Drive Strength Selection for Port D Bits. Each of these control bits selects between low and high output

PTDDSn

drive for the associated PTD pin. For port D pins configured as inputs, these bits have no effect.

 

0

Low output drive strength selected for port D bit n.

 

1

High output drive strength selected for port D bit n.

 

 

 

6.7.5Port E Registers

Port E is controlled by the registers listed below.

6.7.5.1Port E Data Register (PTED)

R

W Reset:

7

6

5

4

3

2

1

0

PTED7

PTED6

PTED5

PTED4

PTED3

PTED2

PTED1

PTED0

 

 

 

 

 

 

 

 

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

Figure 6-27. Port E Data Register (PTED)

MCF51QE128 MCU Series Reference Manual, Rev. 3

128

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Freescale Semiconductor MCF51QE128RM Port E Registers, Port D Slew Rate Enable Register Ptdse, Port E Data Register Pted