mc33880 Freescale Semiconductor, Inc, mc33880 Datasheet - Page 19
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mc33880
Manufacturer Part Number
mc33880
Description
Configurable Octal Serial Switch With Serial Peripheral Interface I/o
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC33880.pdf
(25 pages)
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The Most Significant Bit (MSB) is sent and received first (see below).
Command Register Definition:
0 = Output Command Off
Fault Register Definition:
Table 6. Fault Operation
Analog Integrated Circuit Device Data
Freescale Semiconductor
SERIAL OUTPUT (SO) PINS REPORTS
DEVICE SHUTDOWNS
OUT8
Overtemperature
Overcurrent
Output ON Open Load Fault
Output OFF Open Load Fault
Overvoltage
Overtemperature
MSB
On each SPI communication, an 8-bit command word is sent to the 33880 and an 8-bit fault word is received from the 33880.
1 = Output Command On
0 = No fault
1 = Fault.
OUT7
OUT6
OUT5
OUT4
Fault reported by Serial Output (DO) pin.
DO pin reports short to battery/supply or overcurrent condition.
Not reported.
DO pin reports output OFF open load condition.
Total device shutdown at V
All outputs assuming the previous state upon recovery from overvoltage.
Only the output experiencing an overtemperature fault shuts down. Output assumes previous state
upon recovery from overtemperature.
OUT3
LOGIC COMMANDS AND REGISTERS
OUT2
OUT1
LSB
PWR
= 25 V to 30 V. Resumes normal operation with proper voltage.
LOGIC COMMANDS AND REGISTERS
FUNCTIONAL DEVICE OPERATION
33880
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