Datasheet

Chapter 6 Parallel Input/Output Control
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
94 Freescale Semiconductor
6.5.3.7 Port C Interrupt Pin Select Register (PTCPS)
6.5.3.8 Port C Interrupt Edge Select Register (PTCES)
76543210
R
PTCPS7 PTCPS6 PTCPS5 PTCPS4 PTCPS3 PTCPS2 PTCPS1 PTCPS0
W
Reset:00000000
Figure 6-25. Port C Interrupt Pin Select Register (PTCPS)
Table 6-23. PTCPS Register Field Descriptions
Field Description
7:0
PTCPS[7:0]
Port C Interrupt Pin Selects — Each of the PTCPSn bits enable the corresponding port C interrupt pin.
0 Pin not enabled as interrupt.
1 Pin enabled as interrupt.
76543210
R
PTCES7 PTCES6 PTCES5 PTCES4 PTCES3 PTCES2 PTCES1 PTCES0
W
Reset:00000000
Figure 6-26. Port C Edge Select Register (PTCES)
Table 6-24. PTCES Register Field Descriptions
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.