mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 112

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

Parallel Input/Output Control
6.5.2.3
6.5.2.4
6.5.2.5
6-8
Reset:
Reset:
Reset:
PTBPEn
PTBSEn
Field
Field
7–0
7–0
W
W
W
R
R
R
PTBPE7
PTBSE7
PTBDS7
Internal Pull Enable for Port B Bits — Each of these control bits determines if the internal pullup device is
enabled for the associated PTB pin. For port B 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 B bit n.
1 Internal pullup device enabled for port B bit n.
Output Slew Rate Enable for Port B Bits — Each of these control bits determines if the output slew rate control
is enabled for the associated PTB pin. For port B pins that are configured as inputs, these bits have no effect.
0 Output slew rate control disabled for port B bit n.
1 Output slew rate control enabled for port B bit n.
Port B Pull Enable Register (PTBPE)
0
Port B Slew Rate Enable Register (PTBSE)
0
Port B Drive Strength Selection Register (PTBDS)
0
7
7
7
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Figure 6-11. Drive Strength Selection for Port B Register (PTBDS)
PTBPE6
PTBSE6
PTBDS6
Figure 6-9. Internal Pull Enable for Port B Register (PTBPE)
Figure 6-10. Slew Rate Enable for Port B Register (PTBSE)
0
0
0
6
6
6
Table 6-8. PTBPE Register Field Descriptions
Table 6-9. PTBSE Register Field Descriptions
PTBPE5
PTBSE5
PTBDS5
0
0
0
5
5
5
PTBPE4
PTBSE4
PTBDS4
0
0
0
4
4
4
Description
Description
PTBDS3
PTBPE3
PTBSE3
3
0
3
0
3
0
PTBDS2
PTBPE2
PTBSE2
0
0
0
2
2
2
PTBPE1
PTBSE1
PTBDS1
Freescale Semiconductor
0
0
0
1
1
1
PTBPE0
PTBSE0
PTBDS0
0
0
0
0
0
0