Datasheet

Chapter 6 Parallel Input/Output Control
MC9S08SG32 Data Sheet, Rev. 8
88 Freescale Semiconductor
6.6.2.3 Port B Pull Enable Register (PTBPE)
NOTE
Pull-down devices only apply when using pin interrupt functions, when
corresponding edge select and pin select functions are configured to detect
rising edges.
6.6.2.4 Port B Slew Rate Enable Register (PTBSE)
76543210
R
PTBPE7 PTBPE6 PTBPE5 PTBPE4 PTBPE3 PTBPE2 PTBPE1 PTBPE0
W
Reset: 00000000
Figure 6-13. Internal Pull Enable for Port B Register (PTBPE)
Table 6-12. PTBPE Register Field Descriptions
Field Description
7:0
PTBPE[7:0]
Internal Pull Enable for Port B Bits — Each of these control bits determines if the internal pull-up or pull-down
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 pull-up/pull-down device disabled for port B bit n.
1 Internal pull-up/pull-down device enabled for port B bit n.
76543210
R
PTBSE7 PTBSE6 PTBSE5 PTBSE4 PTBSE3 PTBSE2 PTBSE1 PTBSE0
W
Reset: 00000000
Figure 6-14. Slew Rate Enable for Port B Register (PTBSE)
Table 6-13. PTBSE Register Field Descriptions
Field Description
7:0
PTBSE[7:0]
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.