mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 109

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

6.5.1.2
6.5.1.3
6.5.1.4
Freescale Semiconductor
Reset:
Reset:
Reset:
PTADDn
PTAPEn
Field
Field
7–0
7–0
W
W
W
R
R
R
PTADD7
PTAPE7
PTASE7
Data Direction for Port A Bits — These read/write bits control the direction of port A pins and what is read for
PTAD reads.
0 Input (output driver disabled) and reads return the pin value.
1 Output driver enabled for port A bit n and PTAD reads return the contents of PTADn.
Internal Pull Enable for Port A Bits — Each of these control bits determines if the internal pullup device is
enabled for the associated PTA pin. For port A 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 A bit n.
1 Internal pullup device enabled for port A bit n.
Port A Data Direction Register (PTADD)
0
Port A Pull Enable Register (PTAPE)
0
Port A Slew Rate Enable Register (PTASE)
0
7
7
7
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
PTADD6
PTAPE6
PTASE6
Figure 6-4. Internal Pull Enable for Port A Register (PTAPE)
Figure 6-5. Slew Rate Enable for Port A Register (PTASE)
0
0
0
6
6
6
Figure 6-3. Port A Data Direction Register (PTADD)
Table 6-2. PTADD Register Field Descriptions
Table 6-3. PTAPE Register Field Descriptions
PTADD5
PTAPE5
PTASE5
0
0
0
5
5
5
PTADD4
PTAPE4
PTASE4
0
0
0
4
4
4
Description
Description
PTADD3
PTAPE3
PTASE3
3
0
3
0
3
0
PTADD2
PTAPE2
PTASE2
0
0
0
2
2
2
Parallel Input/Output Control
PTADD1
PTAPE1
PTASE1
0
0
0
1
1
1
PTADD0
PTAPE0
PTASE0
0
0
0
0
0
0
6-5