Datasheet

Parallel Input/Output
MC9S08GT16A/GT8A Data Sheet, Rev. 1
92 Freescale Semiconductor
76543210
R
PTCPE7 PTCPE6 PTCPE5 PTCPE4 PTCPE3 PTCPE2 PTCPE1 PTCPE0
W
Reset 00000000
Figure 6-17. Pullup Enable for Port C (PTCPE)
Table 6-10. PTCPE Field Descriptions
Field Description
7:0
PTCPE[7:0]
Pullup Enable for Port C Bits — For port C pins that are inputs, these read/write control bits determine whether
internal pullup devices are enabled. For port C pins that are configured as outputs, these bits are ignored and
the internal pullup devices are disabled.
0 Internal pullup device disabled.
1 Internal pullup device enabled.
76543210
R
PTCSE7 PTCSE6 PTCSE5 PTCSE4 PTCSE3 PTCSE2 PTCSE1 PTCSE0
W
Reset 00000000
Figure 6-18. Slew Rate Control Enable for Port C (PTCSE)
Table 6-11. PTCSE Field Descriptions
Field Description
7:0
PTCSE[7:0]
Slew Rate Control Enable for Port C Bits — For port C pins that are outputs, these read/write control bits
determine whether the slew rate controlled outputs are enabled. For port B pins that are configured as inputs,
these bits are ignored.
0 Slew rate control disabled.
1 Slew rate control enabled.
76543210
R
PTCDD7 PTCDD6 PTCDD5 PTCDD4 PTCDD3 PTCDD2 PTCDD1 PTCDD0
W
Reset 00000000
Figure 6-19. Data Direction for Port C (PTCDD)
Table 6-12. PTCDD Field Descriptions
Field Description
7:0
PTCDD[7:0]
Data Direction for Port C Bits — These read/write bits control the direction of port C pins and what is read for
PTCD reads.
0 Input (output driver disabled) and reads return the pin value.
1 Output driver enabled for port C bit n and PTCD reads return the contents of PTCDn.