mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 115

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

6.5.3.5
6.5.4
Port D is an 8-bit input/output port and also shares its pins with the FTM1, FTM2, keyboard interrupt,
ACMP1 and the 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
details on pin function priorities.
Port D is controlled by the registers listed below.
Freescale Semiconductor
Reset:
PTCDSn
PTCSEn
Field
Field
•
•
•
•
•
•
•
•
6–0
6–0
W
R
PTD0 shares its pin with AD1P8 and ACMP1+.
PTD1 shares its pin with AD1P9 and ACMP1–.
PTD2 shares its pin with KBI1P5, AD1P10 and ACMP1O.
PTD3 shares its pin with KBI1P6 and AD1P11.
PTD4 shares its pin with FTM2CLK and AD1P12.
PTD5 shares its pin with AD1P13.
PTD6 shares its pin with FTM1CLK and AD1P14.
PTD7 shares its pin with KBI1P7 and AD1P15.
Port D Registers
Output Slew Rate Enable for Port C Bits — Each of these control bits determines if the output slew rate control
is enabled for the associated PTC pin. For port C pins that are configured as inputs, these bits have no effect.
0 Output slew rate control disabled for port C bit n.
1 Output slew rate control enabled for port C bit n.
Output Drive Strength Selection for Port C Bits — Each of these control bits selects between low and high
output drive for the associated PTC pin. For port C pins that are configured as inputs, these bits have no effect.
0 Low output drive strength selected for port C bit n.
1 High output drive strength selected for port C bit n.
Port C Drive Strength Selection Register (PTCDS)
0
0
7
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Figure 6-16. Drive Strength Selection for Port C Register (PTCDS)
PTCDS6
0
6
Table 6-14. PTCSE Register Field Descriptions
Table 6-15. PTCDS Register Field Descriptions
PTCDS5
0
5
PTCDS4
0
4
Description
Description
PTCDS3
3
0
PTCDS2
0
2
Parallel Input/Output Control
PTCDS1
0
1
Table 2-1
PTCDS0
0
0
for
6-11