mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 122

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

Parallel Input/Output Control
6.5.6.4
6.5.6.5
6.5.7
Port G is a 7-bit input/output port and also share its pins with the oscillator, keyboard interrupt, and ADC
peripherals. On reset, the pins will default to the input state and under the I/O control. Enabling any of the
shared peripherals will take priority control over the pins. See
priorities.
6-18
Reset:
Reset:
PTFDSn
PTFSEn
Field
Field
•
•
•
•
•
7–0
7–0
W
W
R
R
PTG0 shares its pin with KBIP0.
PTG1 shares its pin with KBIP1.
PTG2 shares its pin with KBIP2.
PTG3 shares its pin with KBIP3 and AD1P18.
PTG4 shares its pin with KBIP4 and AD1P19.
PTFDS7
PTFSE7
Port G Registers
Output Slew Rate Enable for Port F Bits — Each of these control bits determines if the output slew rate control
is enabled for the associated PTF pin. For port F pins that are configured as inputs, these bits have no effect.
0 Output slew rate control disabled for port F bit n.
1 Output slew rate control enabled for port F bit n.
Output Drive Strength Selection for Port F Bits — Each of these control bits selects between low and high
output drive for the associated PTF pin. For port F pins that are configured as inputs, these bits have no effect.
0 Low output drive strength selected for port F bit n.
1 High output drive strength selected for port F bit n.
Port F Slew Rate Enable Register (PTFSE)
0
Port F Drive Strength Selection Register (PTFDS)
0
7
7
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Figure 6-31. Drive Strength Selection for Port F Register (PTFDS)
PTFDS6
PTFSE6
Figure 6-30. Slew Rate Enable for Port F Register (PTFSE)
0
0
6
6
Table 6-30. PTFDS Register Field Descriptions
Table 6-29. PTFSE Register Field Descriptions
PTFSE5
PTFDS5
0
0
5
5
PTFSE4
PTFDS4
0
0
4
4
Description
Description
PTFSE3
PTFDS3
3
0
3
0
Table 2-1
PTFSE2
PTFDS2
for details on pin function
0
0
2
2
PTFDS1
PTFSE1
Freescale Semiconductor
0
0
1
1
PTFDS0
PTFSE0
0
0
0
0