mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 117

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

6.5.4.4
6.5.4.5
6.5.5
Port E is an 8-bit input/output port and also shares its pins with the RPGIO, SPI1, SCI1 and the FTM1
peripherals. On reset the pins will default to the input state and under the I/O control. Enabling any of the
Freescale Semiconductor
Reset:
Reset:
PTDDSn
PTDPEn
PTDSEn
Field
Field
Field
7–0
7–0
7–0
W
W
R
R
PTDSE7
PTDDS7
Port E Registers
Internal Pull Enable for Port D Bits — Each of these control bits determines if the internal pullup device is
enabled for the associated PTD pin. For port D pins that are configured as outputs, these bits have no effect and
the internal pull devices are disabled.
0 Internal pullup device disabled for port D bit n.
1 Internal pullup device enabled for port D bit n.
Output Slew Rate Enable for Port D Bits — Each of these control bits determines if the output slew rate control
is enabled for the associated PTD pin. For port D pins that are 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.
Output Drive Strength Selection for Port D Bits — Each of these control bits selects between low and high
output drive for the associated PTD pin. For port D pins that are 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.
Port D Slew Rate Enable Register (PTDSE)
0
Port D Drive Strength Selection Register (PTDDS)
0
7
7
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Figure 6-21. Drive Strength Selection for Port D Register (PTDDS)
PTDDS6
PTDSE6
Figure 6-20. Slew Rate Enable for Port D Register (PTDSE)
0
0
6
6
Table 6-18. PTDPE Register Field Descriptions
Table 6-19. PTDSE Register Field Descriptions
Table 6-20. PTDDS Register Field Descriptions
PTDDS5
PTDSE5
0
0
5
5
PTDDS4
PTDSE4
0
0
4
4
Description
Description
Description
PTDSE3
PTDDS3
3
0
3
0
PTDSE2
PTDDS2
0
0
2
2
Parallel Input/Output Control
PTDSE1
PTDDS1
0
0
1
1
PTDDS0
PTDSE0
0
0
0
0
6-13