MC9S08EL32 Datasheet, PDF (94/356 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit (CPU)

Chapter 6 Parallel Input/Output Control
6.5.3.7 Port C Interrupt Pin Select Register (PTCPS)
R
W
Reset:
7
PTCPS7
0
6
PTCPS6
5
PTCPS5
4
PTCPS4
3
PTCPS3
2
PTCPS2
1
PTCPS1
0
0
0
0
0
0
Figure 6-25. Port C Interrupt Pin Select Register (PTCPS)
Table 6-23. PTCPS Register Field Descriptions
0
PTCPS0
0
Field
Description
7:0
Port C Interrupt Pin Selects — Each of the PTCPSn bits enable the corresponding port C interrupt pin.
PTCPS[7:0] 0 Pin not enabled as interrupt.
1 Pin enabled as interrupt.
6.5.3.8 Port C Interrupt Edge Select Register (PTCES)
R
W
Reset:
7
PTCES7
0
6
PTCES6
5
PTCES5
4
PTCES4
3
PTCES3
2
PTCES2
0
0
0
0
0
Figure 6-26. Port C Edge Select Register (PTCES)
Table 6-24. PTCES Register Field Descriptions
1
PTCES1
0
0
PTCES0
0
Field
Description
7:0
PTCES[7:0]
Port C Edge Selects — Each of the PTCESn bits serves a dual purpose by selecting the polarity of the active
interrupt edge as well as selecting a pull-up or pull-down device if enabled.
0 A pull-up device is connected to the associated pin interrupt and detects falling edge/low level for interrupt
generation.
1 A pull-down device is connected to the associated pin interrupt and detects rising edge/high level for interrupt
generation.
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
94
Freescale Semiconductor