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AN4440 Datasheet(PDF) 25 Page - STMicroelectronics |
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AN4440 Datasheet(HTML) 25 Page - STMicroelectronics |
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25 / 36 page  DocID025913 Rev 1 25/36 AN4440 USID modification 36 Test new USID • Send a frame with new USID: Send 96d to register 1: New USID = 0001b, register 1 = 00001b, date = 96d = 01100000b, parity 1 = 0, parity 2 = 1 Figure 35. Send data to DAC B with new USID DAB value will be updated to 15.6 V • Send a frame with old USD: Try to send 56d to register 1: Old USID = 0111b, register 1 = 00001b, date = 56d = 00011100b, parity 1 = 0, parity 2 = 0 Figure 36. Send data to DAC B with old USID DAB B value will not be updated. Test with AUT (automatic mode) Set SELSID: if the SELSID pin is tied to Vcc: SELSID = 1 or if SELSID is to GND: SELSID = 0 Set new USID Click on program Figure 37. USID modification with AUT (automatic mode) HVDAC is reprogrammed with new USID. Now each frame (programming DAC value, for example) is sent with this new USID. |
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