Freescale Semiconductor HCS08 Series, Reference Manual

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Chapter 6 Parallel Input/Output
MC9S08JS16 MCU Series Reference Manual, Rev. 4
Freescale Semiconductor 83
7 6 5 4 3 2 1 0
R
PTAPE7 PTAPE6 PTAPE5 PTAPE4 PTAPE3 PTAPE2 PTAPE1 PTAPE0
W
Reset 0 0 0 0 0 0 0 0
Figure 6-4. Internal Pullup Enable for Port A (PTAPE)
Table 6-3. PTAPE Register Field Descriptions
Field Description
[7:0]
PTAPE[7:0]
Internal Pullup 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 pullup devices are disabled.
0 Internal pullup device disabled for port A bit n.
1 Internal pullup device enabled for port A bit n.
7 6 5 4 3 2 1 0
R
PTASE7 PTASE6 PTASE5 PTASE4 PTASE3 PTASE2 PTASE1 PTASE0
W
Reset 0 0 0 0 0 0 0 0
Figure 6-5. Output Slew Rate Control Enable for Port A (PTASE)
Table 6-4. PTASE Register Field Descriptions
Field Description
7:0
PTASE[7:0]
Output Slew Rate Control Enable for Port A Bits — Each of these control bits determine whether output slew
rate control is enabled for the associated PTA pin. For port A pins that are configured as inputs, these bits have
no effect.
0 Output slew rate control disabled for port A bit n.
1 Output slew rate control enabled for port A bit n.
7 6 5 4 3 2 1 0
R
PTADS7 PTADS6 PTADS5 PTADS4 PTADS3 PTADS2 PTADS1 PTADS0
W
Reset 0 0 0 0 0 0 0 0
Figure 6-6. Output Drive Strength Selection for Port A (PTADS)
Table 6-5. PTADS Register Field Descriptions
Field Description
7:0
PTADS[7:0]
Output Drive Strength Selection for Port A Bits — Each of these control bits selects between low and high
output drive for the associated PTA pin.
0 Low output drive enabled for port A bit n.
1 High output drive enabled for port A bit n.