mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 126

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

Parallel Input/Output Control
6.5.8.2
6.5.8.3
6.5.8.4
6-22
Reset:
Reset:
Reset:
PTHDDn
PTHPEn
Field
Field
6–0
6–0
W
W
W
R
R
R
Data Direction for Port H Bits — These read/write bits control the direction of port H pins and what is read for
PTHD reads.
0 Input (output driver disabled) and reads return the pin value.
1 Output driver enabled for port H bit n and PTHD reads return the contents of PTHDn.
Internal Pull Enable for Port H Bits — Each of these control bits determines if the internal pullup device is
enabled for the associated PTH pin. For port H 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 H bit n.
1 Internal pullup device enabled for port H bit n.
Port H Data Direction Register (PTHDD)
0
0
Port H Pull Enable Register (PTHPE)
0
0
Port H Slew Rate Enable Register (PTHSE)
0
0
7
7
7
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
PTHDD6
PTHPE6
PTHSE6
Figure 6-39. Internal Pull Enable for Port H Register (PTHPE)
Figure 6-40. Slew Rate Enable for Port H Register (PTHSE)
0
0
0
6
6
6
Figure 6-38. Port H Data Direction Register (PTHDD)
Table 6-37. PTHDD Register Field Descriptions
Table 6-38. PTHPE Register Field Descriptions
PTHDD5
PTHPE5
PTHSE5
0
0
0
5
5
5
PTHDD4
PTHPE4
PTHSE4
0
0
0
4
4
4
Description
Description
PTHDD3
PTHPE3
PTHSE3
3
0
3
0
3
0
PTHDD2
PTHPE2
PTHSE2
0
0
0
2
2
2
PTHDD1
PTHPE1
PTHSE1
Freescale Semiconductor
0
0
0
1
1
1
PTHDD0
PTHPE0
PTHSE0
0
0
0
0
0
0