L9965T datasheet(59/62 Pages) STMICROELECTRONICS

59 / 62 page

List of figures

Figure 1.

L9965T in a L9965x-based BMS system .................................................. 2

Figure 2.

Single die block diagram ............................................................. 4

Figure 3.

Pinout L9965T (top view) ............................................................. 5

Figure 4.

Pinout L9965T (top view) ............................................................. 5

Figure 5.

L9965T/TS functional state mode (FSM) ................................................. 12

Figure 6.

Wakeup by fault of a daisy chain device ................................................. 14

Figure 7.

Wakeup condition by SPI Slave ....................................................... 15

Figure 8.

CYCLIC_WAKEUP operation ......................................................... 17

Figure 9.

SPI – VIF interface management ...................................................... 26

Figure 10.

SPI Target timing diagram ........................................................... 30

Figure 11.

VIF waveform .................................................................... 32

Figure 12.

Single read/write frame protocol ....................................................... 35

Figure 13.

SPI burst read ................................................................... 38

Figure 14.

Accessing the FIFO from the same side of the ring .......................................... 39

Figure 15.

Accessing the FIFO from the opposite side of the ring ........................................ 39

Figure 16.

Wakeup by MCU.................................................................. 41

Figure 17.

BNE pin structure ................................................................. 44

Figure 18.

FLT pin structure.................................................................. 45

Figure 19.

WKP pin application circuit ........................................................... 45

Figure 20.

Application circuit – capacitive isolation .................................................. 51

Figure 21.

Application circuit – transformer isolation ................................................. 52

Figure 22.

LQFP32L (7x7x1.4 mm 5V FULL PLASTIC) package outline ................................... 54

L9965T/L9965TS

List of figures

DS14987 - Rev 1

page 59/62

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