Freescale Semiconductor M68HC08 manual System Setup Definitions

Definitions of Constants and Variables

5.6.1 System Setup Definitions

The following constants can be used to set up the system behavior, according to required conditions.

1.#define HW_VAR HYST

...defines HW variation - hysteresis current control mode (HYST) or discontinuous conduction mode (DCM).

2.#define INP_VOLT U110V

...defines input voltage lower (U110V) or higher (U230V) than half of DC-bus voltage.

3.	#define	INPVOLTFREQ			50
	...defines the mains voltage frequency as 50 Hz or 60 Hz.
4.	#define	BUSCLK	4000000
	...sets the internal bus frequency to 4 MHz.
5.	#define	BUSCLKX2		8000000
	...set according to the internal bus frequency (BUSCLKX2=2*BUSCLK).
6.	#define	TIMPRSC		2
	...sets BUSCLK/4 as a TIM clock source.
7.	#define	PWM_MODULUS		100		/*see DLB_setup.xls */
	...represents the number of possible PWM duty cycles from 0% to 100% duty cycle.
8.	#define	PWM_RELOADCYCLES				4	/*see DLB_setup.xls */
	...defines that PWM values are reloaded every 4th PWM cycle.
9.	#define	PWM_RELOADS			100	/*see DLB_setup.xls */
	...represents the PWM reload period.					/*see DLB_setup.xls */
10.	#define	PWM_PRESCALER			1
	...sets BUSCLK as a PWM clock frequency.
11.	#define PWM_START_POINTER					97
	...represents a start pointer to a value in table bSinTab[].
12.	#define DUTY_CYCLE_MAX				99
	...represents a maximum allowed duty cycle value according input voltage and frequency.
13.	#define	HRP_SCALINGFACTOR				32	/*see DLB_setup.xls */
	...sets the scaling factor for the HRP.
14.	#define HRPTB_H			0X00	/*see DLB_setup.xls */
	...represents the HRP time base high byte.
15.	#define HRPTB_L			0X43	/*see DLB_setup.xls */
	...represents the HRP time base low byte.
16.	#define HRP_DEADTIME				0X08	/*see DLB_setup.xls */
	...defines the HRP deadtime.				120	/*see DLB_setup.xls */
17.	#define MAX_HRP_FREQ
	...defines the maximum HRP frequency in kHz.
18.	#define MAX_HRP_FREQ_TIME					20
	...defines the time spent at maximum HRP frequency in ms.
19.	#define MIN_HRP_FREQ				40	/*see DLB_setup.xls */
	...defines the minimum HRP frequency in kHz.
20.	#define	PREHEAT_FREQ			86
	...defines the preheat HRP frequency in kHz.
21.	#define	PREHEAT_TIME			900
	...defines the time spent at preheat HRP frequency in ms.
		Dimmable Light Ballast with Power Factor Correction, Rev. 1
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