CPUConfiguration Struct Reference

Store CPU high and low speed peripheral clock prescaler. More...

#include <cpu.h>

Data Fields
Uint32	oscCLK
	Oscillator frequency.
Uint16	dsp28_DIVSEL
	SYSCLKOUT divider (0,1).
Uint16	dsp28_PLLCR
	PLL (0,10).
Uint16	hspCLK
	High-speed peripheral clock prescaler.
Uint16	lspCLK
	Low-speed peripheral clock prescaler.

Detailed Description

Store CPU high and low speed peripheral clock prescaler.

----------------------------------------------------------------------------- Specify the clock rate of the CPU (SYSCLKOUT) in nS.

Take into account the input clock frequency and the PLL multiplier selected in step 1.

Use one of the values provided, or define your own. The trailing L is required tells the compiler to treat the number as a 64-bit value.

Only one statement should be uncommented.

Example: CLKIN is a 20MHz crystal.

In step 1 the user specified PLLCR = 0xA for a 100Mhz CPU clock (SYSCLKOUT = 100MHz).

In this case, the CPU_RATE will be 10.000L Uncomment the line: define CPU_RATE 10.000L

For a 60 MHz CPU clock (SYSCLKOUT = 60MHz), user specified PLLCR = 0x06 in step 1.

In this case, the CPU_RATE will be 16.667L Uncomment the line: define CPU_RATE 16.667L ----------------------------------------------------------------------------- ----------------------------------------------------------------------------- Specify the SYSCLKOUT max frequency for examples - either 60 MHz (for 60 MHz devices only) or 100 MHz (for all other devices - this is the default SYSCLKOUT frequency for all examples).

Doing so will allow the debugger to compile Example code which is dependent upon CPU frequency for that frequency.

Example: CLKIN is a 20MHz crystal. In step 1 the user specified PLLCR = 0xA for a 100 MHz CPU clock (SYSCLKOUT = 100MHz).

Then define CPU_FRQ_100MHZ is set as 1 (default) and define CPU_FRQ_60MHZ is set as 0 (default).

If PLLCR = 0x06 in step 1, then: define CPU_FRQ_100MHZ is set as 0 and define CPU_FRQ_60MHZ is set as 1. -----------------------------------------------------------------------------

Definition at line 155 of file cpu.h.