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L9662 Datasheet(PDF) 40 Page - STMicroelectronics |
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L9662 Datasheet(HTML) 40 Page - STMicroelectronics |
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40 / 80 page  Functional description L9662 40/80 DocID028325 Rev 1 Both the satellite and squib circuits can be reset over when sending the appropriate configuration commands via SPI1. Configuration commands Configuration mode 1 Configuration mode 1 main functions are as follows: Set Deployment current for all channels. All channels will be either set to 1.2 A/2 ms, 1.5 A/2 ms (Maximum VRESx Voltage limited to 25 V) 1.75 A/1 ms or 1.75 A/0.65 ms Perform a software reset The SPI message definition for MOSI commands and MISO responses in this mode are defined below. Table 16. Command description summary Command/mode Description Mode bits D15 D14 D13 D12 D11 D10 D09 D08 D07 - D00 Configuration commands Config. Mode 1 Current limit programming and software reset 00 P - - 0 - - - Config. Mode 2 FEN latch time Programming 0 0 P - - 1 - - - Deployment commands Deployment Mode 1 Arming Command 0 1 P 1 1 0 0 1 - Deployment Mode 2 Firing Command 0 1 P 0 0 0 0 0 - Diagnostic commands Diagnostic Mode 1 Disable Diagnostic 1 0 P - 0 0 0 - - Diagnostic Mode 2 Short to battery & ground diagnostics Short between loop diagnostics 10 P - 001 - - Diagnostic Mode 3 VRESx voltage diagnostics 1 0 P - 0 1 0 - - Diagnostic Mode 4 High Side Safing diagnostics 1 0 P - 0 1 1 - - Diagnostic Mode 5 Squib Resistance Diagnostics 1 0 P - 1 0 0 - - Diagnostic Mode 6 High Squib Resistance Diagnostics 1 0 P - 1 0 1 - - Diagnostic Mode 7 LS driver diagnostics 1 0 P - 1 1 0 - - Diagnostic Mode 8 HS driver diagnostics 1 0 P - 1 1 1 - - Monitor commands Monitor Mode 1 Deployment status 1 1 P - 0 0 - - - Monitor Mode 2 Channel current limit measurement information 11 P - 01 - - - Monitor Mode 3 FENx function status and active current limit status 11 P - 10 - - - Monitor Mode 4 Revision and device ID 1 1 P - 1 1 - - - P = Parity bit – all commands and responses will use this bit to achieve odd parity |
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