mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 330

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

Application Examples
13.6.2 PLIC Initialization
The ports on the PLIC module of the MCF5272 require a number of registers to be
configured after power-on reset and prior to use. The following are the steps necessary for
initializing the ports.
The port configuration registers, PnCR, and the interrupt configuration register, PnICR,
must be initialized before using any port.
13.6.2.1 Port Configuration Example
The following example shows a basic configuration of port 1, assuming the following:
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• Specify which ports are active.
• Specify the operational modes, IDL8, IDL10, and so on, for the active ports,
• If GCI mode is specified in PnCR[M], select whether GCI SCIT mode is to be used,
• If port 1 is used, program whether the 2-KHz frame interrupt is to be derived from
• If port 1 is used, program whether it receives as inputs DCL and FSC or whether it
• If the port is in GCI mode, the PnCR[ACT] bit may be set if GCI Activation should
• If port 3 is used, program the PnCR[DMX] bit if this port is routed through physical
• Program the shift direction for the B1 and B2 channels, PnCR[SHB1–SHB2], to
• Program PnCR[ENB1–ENB2] to specify whether B1 or B2 is enabled at
• port 1 is active as slave using IDL10 mode
• 2-KHz frame interrupt derived from port 1
• msb first on B1 and B2
• B1 and B2 disabled.
PnCR[M].
PnCR[G/S]
port 0 or port 1, PnCR[FSM].
drives these signals as outputs.
be requested.
interface 3 (DIN3/DOUT3).
specify msb or lsb first.
initialization.
MCF5272 User’s Manual
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