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Communication Processor Module
CTSx—Clear To Send 2 and 3
0 = PCx is a general-purpose interrupt I/O pin. The SCCx internal CTSx signal is
always asserted. If PCDIR configures this pin as an input, the pin can generate an
interrupt to the core, as controlled by the PCINT bits.
1 = PCx is connected to the corresponding SCCx signal input in addition to being a
general-purpose interrupt pin.
USBRXN—USB Receive (Negative Differential)
0 = PC10 is general purpose I/O pin. If PCDIR configures this pin as an input, the pin
can generate an interrupt to the core, as controlled by the PCINT bits.
1 = PC10 functions as USBRXN, provided that bits PCDIR[10] and PCPAR[10] are
zero. In addition, this pin is a general-purpose interrupt pin.
USBRXP—USB Receive (Positive Differential)
0 = PC11 is general purpose I/O pin. If PCDIR configures this pin as an input, the pin
can generate an interrupt to the core, as controlled by the PCINT bits.
1 = PC11 functions as USBRXP, provided that bits PCDIR[11] and PCPAR[11] are
zero. In addition, this pin is a general-purpose interrupt pin.
DREQx— DMA Request to the RISC Microcontroller
0 = PCx is a general-purpose interrupt I/O pin, with the direction controlled in PCDIR.
If PCDIR configures this pin as an input, the pin can generate an interrupt to the
core, as controlled by the PCINT bits.
1 = PCx becomes an external request to the RISC microcontroller instead of being a
general-purpose interrupt pin. The corresponding PCINT bits control when a
request is generated.
Note: DREQx must only be set if you are using IDMA.
16-494
MPC823e REFERENCE MANUAL
MOTOROLA
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