MC9S08EL32 Datasheet, PDF (93/356 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit (CPU)

6.5.3.5
Chapter 6 Parallel Input/Output Control
Port C Drive Strength Selection Register (PTCDS)
7
R
PTCDS7
W
6
PTCDS6
5
PTCDS5
4
PTCDS4
3
PTCDS3
2
PTCDS2
1
PTCDS1
Reset:
0
0
0
0
0
0
0
Figure 6-23. Drive Strength Selection for Port C Register (PTCDS)
Table 6-21. PTCDS Register Field Descriptions
0
PTCDS0
0
Field
Description
7:0
Output Drive Strength Selection for Port C Bits — Each of these control bits selects between low and high
PTCDS[7:0] output drive for the associated PTC pin. For port C pins that are configured as inputs, these bits have no effect.
0 Low output drive strength selected for port C bit n.
1 High output drive strength selected for port C bit n.
6.5.3.6 Port C Interrupt Status and Control Register (PTCSC)
R
W
Reset:
7
6
5
4
3
2
1
0
0
0
0
0
PTCIF
0
PTCIE
PTCMOD
PTCACK
0
0
0
0
0
0
0
0
Figure 6-24. Port C Interrupt Status and Control Register (PTCSC)
Table 6-22. PTCSC Register Field Descriptions
Field
Description
3
PTCIF
Port C Interrupt Flag — PTCIF indicates when a port D interrupt is detected. Writes have no effect on PTCIF.
0 No port C interrupt detected.
1 Port C interrupt detected.
2
Port C Interrupt Acknowledge — Writing a 1 to PTCACK is part of the flag clearing mechanism. PTCACK
PTCACK always reads as 0.
1
PTCIE
Port C Interrupt Enable — PTCIE determines whether a port C interrupt is requested.
0 Port C interrupt request not enabled.
1 Port C interrupt request enabled.
0
PTCMOD
Port C Detection Mode — PTCMOD (along with the PTCES bits) controls the detection mode of the port C
interrupt pins.
0 Port C pins detect edges only.
1 Port C pins detect both edges and levels.
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
Freescale Semiconductor
93