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MM912F634CV2AP Datasheet(PDF) 83 Page - Freescale Semiconductor, Inc |
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MM912F634CV2AP Datasheet(HTML) 83 Page - Freescale Semiconductor, Inc |
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83 / 335 page  Functional Description and Application Information Low Side Drivers - LSx MM912F634 Freescale Semiconductor 83 4.12 Low Side Drivers - LSx 4.12.1 Introduction / Features These outputs are two Low Side drivers intended to drive relays (inductive loads) incorporating the following features: • PWM capability • Open load detection • Current limitation • Over-temperature shutdown (with maskable interrupt) • Active clamp • Independent VREG - High Voltage Shutdown 4.12.1.1 Block Diagram The following Figure shows the basic structure of the LS drivers. Figure 22. Low Side Drivers - Block Diagram 4.12.1.2 Modes of Operation The Low Side module is active only in Normal mode; the Low Side drivers are disabled in Sleep and Stop mode. 4.12.2 External Signal Description This section lists and describes the signals that do connect off-chip. Table 101 shows all the pins and their functions that are controlled by the Low Side module. Table 101. Pin Functions and Priorities Pin Name Pin Function & Priority I/O Description Pin Function after Reset LS1 High Voltage Output O Low Side Power Output Driver, Active Clamping LS1 LS2 O LS2 ANALOG LSx Low Side - Driver (active clamp) open load detection current limitation overtemperture shutdown (maskable interrupt) VREG high voltage shutdown (maskable interrupt) PGND active clamp Interrupt Control Module LSOTIE LS - Control LSx LSxOL LSxCL MODE[1:0] on/off Status PWMLSx LSOTC PWMCSx VROVC VROVIE Vreg high voltage LSCEN[3:0] VDD Digital Sleep2p5 Digital 4Bit 4Bit VREG HV Shutdown Latch Control 1Bit Located in VCR Located in VSR |
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