MLX10407 Datasheet, PDF (8/9 Pages) List of Unclassifed Manufacturers – 5-Channel Gauge Driver with Serial Link

MLX10407
5-Channel Gauge Driver with Serial Link
PWM Generation
1) Logometers 360° ( Logo 1 and Logo 2 ):
From the angle value received from the MCU (range [0° - 89.8°]), the 10407 generates two PWM
signals (9 bit resolution) :
• The first one represents the sine PWMSIN,
• The second one is the cosine PWMCOS.
The 10407 uses a 512x9 ROM containing the sine of all angular values in the range [0° -89.8°]
(note that the lsb value of the angle is not used).
An angle value greater than 90° is obtained using different quadrant values :
• Q1 (D14D15 = 00) > 0° =< a < 90°
• Q2 (D14D15 = 01) > 90° =< a < 180°
• Q3 (D14D15 = 10) > 180° =< a < 270°
• Q4 (D14D15 = 11) > 270° =< a < 360°
a is the angle value
The PWM are switched to the outputs depending on the value of the quadrant :
QUADRANT SIN1M
D14
D15
SIN1P
COS1M COS1P
0
0
0
PWMSIN
0 PWMCOS
0
1
0 PWMCOS PWMSIN
0
1
0
PWMSIN
0 PWMCOS
0
1
1
PWMCOS
0
0
PWMSIN
• Logometer 1 is driven by outputs SIN1M/P COS1M/P,
• Logometer 2 is driven by outputs SIN2M/P COS2M/P.
The PWM frequency is given by :
F_PWM = F_OSC / 512 (F_OSC = Crystal oscillator frequency)
2) Logometers 90°
• There are three separate PWM outputs for Logo 3, Logo 4 and Logo 5.
MLX10407 5-Channel Gauge Driver with Serial Link Page 8
Rev 1.1 27/Apr/01