TPIC2603

6CHANNEL SERIAL INTERFACE LOW SIDE DRIVER

SLIS056A − FEBRUARY 1995 − REVISED MARCH 1996

7

POST OFFICE BOX 655303

POST OFFICE BOX 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

1

234

5

6

7

8

SCLK

CS

SDO

3-STATE

FLT0

FLT1

FLT2

FLT3

FLT4

FLT5

OT

N/A

3-STATE

Bit1

Bit2

Bit3

Bit4

Bit5

Bit6

Bit7

Bit0

NOTE A: MSB is the first bit transferred.

Figure 3. Serial Output Control