Freescale Semiconductor HCS08 Series, Reference Manual

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Chapter 6 Parallel Input/Output
MC9S08JS16 MCU Series Reference Manual, Rev. 4
Freescale Semiconductor 85
7 6 5 4 3 2 1 0
R 0 0
PTBPE5 PTBPE4 R R PTBPE1 PTBPE0
W
Reset 0 0 0 0 0 0 0 0
= Unimplemented or Reserved
Figure 6-9. Internal Pullup Enable for Port B (PTBPE)
Table 6-8. PTBPE Register Field Descriptions
Field Description
5:4, 1:0
PTBPE[5:4,
1:0]
Internal Pullup 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 pullup devices are disabled.
0 Internal pullup device disabled for port B bit n.
1 Internal pullup device enabled for port B bit n.
7 6 5 4 3 2 1 0
R 0 0
PTBSE5 PTBSE4 PTBSE3 PTBSE2 PTBSE1
0
W
Reset 0 0 0 0 0 0 0 0
= Unimplemented or Reserved
Figure 6-10. Output Slew Rate Control Enable (PTBSE)
Table 6-9. PTBSE Register Field Descriptions
Field Description
5:0
PTBSE[5:1]
Output Slew Rate Control Enable for Port B Bits — Each of these control bits determine whether 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.
7 6 5 4 3 2 1 0
R 0 0
PTBDS5 PTBDS4 PTBDS3 PTBDS2 PTBDS1
0
W
Reset 0 0 0 0 0 0 0 0
= Unimplemented or Reserved
Figure 6-11. Output Drive Strength Selection for Port B (PTBDS)