Datasheet

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    
SLIS056A − FEBRUARY 1995 − REVISED MARCH 1996
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
PRINCIPLES OF OPERATION
serial interface (continued)
Fault isolation data for each channel and global over-temperature status is transferred to the control device
using the serial interface. Fault status for the TPIC2603 is captured as CS
transits low. The fault interface
monitors the SDI terminal and exclusively ORs the respective input control bit with the corresponding fault
information bit stored in the fault register. Each exclusive ORed fault bit is transferred out the SDO terminal on
the rising edge of the SCLK. Serial data can be transferred in 8-bit or 16-bit words as illustrated in Figure 4, with
fault data appearing in the first 8-bits of serial output data. The CS
must be transited high after the serial transfer
has completely latched the new control data into the output control buffer and re-enable fault reporting on the
device (see Figures 3 and 4).
NA = Unused
OT = Over-temperature fault bit
FLT5 = Shorted or open-load fault on channel 5
FLT4 = Shorted or open-load fault on channel 4
FLT3 = Shorted or open-load fault on channel 3
FLT2 = Shorted or open-load fault on channel 2
FLT1 = Shorted or open-load fault on channel 1
FLT0 = Shorted or open-load fault on channel 0
12345678
SCLK
CS
SDO 3-STATEFLT0FLT1FLT2FLT3FLT4FLT5OTN/A3-STATE
Bit1Bit2Bit3Bit4Bit5Bit6Bit7
Bit0
NOTE A: MSB is the first bit transferred.
Figure 3. Serial Output Control