Motorola M68HC08 Reference Manual page 135

6.5.3.3 Voltage Setting Hardware Customizing
6.5.3.4 Current Setting Hardware Customizing
DRM028 — Rev 0
MOTOROLA
Freescale Semiconductor, Inc.
/* MUST_IF_HW_CHANGE_1: */
#define DUTY_PWM_MAX 0.96
Range: <0,1>
Proportional value of maximal PWM duty cycle is determined by
power stage boards used.
DUTY_PWM_MAX must be set for any hardware customizing. Some
hardware boards need maximal duty cycle<1, in order to charge high
side drivers for power inverters.
Maximal measurable voltage determined by hardware voltage sensing
[V]:
/* MUST_IF_HW_CHANGE_2: */
# define VOLT_HW_MAX
Range: <0,infinity)
VOLT_HW_MAX must be changed when voltage sensing range is
different from default hardware.
Maximum limit of dc-bus voltage allowable for the hardware [V]:
/* MUST_IF_HW_CHANGE_3 */
#define VOLT_MAX_FAULT_V 380.0
Range: <0,VOLT_RANGE_MAX>
VOLT_MAX_FAULT_V determines the maximal voltage when the
drive fault state should be entered. So the constant
VOLT_MAX_FAULT_V must be set according to maximal voltage
limit of the power stage or the motor, using the lower value. Therefore,
setting this constant is also mentioned in
Voltage Limits Setting
Maximal measurable current determined by hardware current sensing
[A]:
/* MUST_IF_HW_CHANGE_4: */
#define CURR_HW_MAX_A
Range: <0,infinity)
User Guide
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407.0
Maximal and Minimal
under a different label (CAN_CHANGE_1).
2.93
Designer Reference Manual
User Guide
Tuning for Customer Motor
135