DRV3202-Q1_15 Datasheet, PDF (12/39 Pages) Texas Instruments – 3-Phase Brushless Motor Driver

DRV3202-Q1
SLVSBJ4A – OCTOBER 2012 – REVISED DECEMBER 2012
Diag happen!
Twait > 5 µs
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CS
CLK
DIN
MSB ~ bit10 bit9 bit8 bit7 ~ bit0
DOUT Command Data for Diagnosis
MSB ~ bit10 bit9 bit8 bit7 ~ bit0
DOUT Command Data for Diagnosis
Internal Diagnosis
Shadow Register
Internal Diagnosis
Status Register
New Diagnosis Data
During bit7 ~ bit0
Diagnosis Data Against DIN Command New Diagnosis Data
DOUT
DIN ECHO
Diagnosis
Hi-Z
'RQ¶W FDUH
Figure 7. DIAG_READ
DIN ECHO
New
Hi-Z
'RQ¶W FDUH
Internal Diagnosis Register (Status Register and Shadow Register)
If the diagnosis happens during the SPI communication, the function follows this protocol:
The diagnosis information is stored in the shadow register when the diagnosis happens.
After the output of the previous information a new diagnosis is sent from the shadow to the status register,
and both registers are output through the DOUT pin.
In this case, a FAULT signal continues to be output until a new diagnosis is read by the CPU.
All diagnosis bits read by the DIAG_READ1 command happen before the CS falling edge. So, all the diagnosis
events that happen right after the CS falling edge are not read by the current DIAG_READ1 command, instead
they are read by the next DIAG_READ1 command.
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