L9662 datasheet(42/80 Pages) STMICROELECTRONICS

42 / 80 page

Functional description

L9662

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DocID028325 Rev 1

sequences are received, bit D0 is set to ‘1.’ Otherwise, bit D0 is set to

‘0.’ When ASIC receives valid soft reset sequences, it will send a MISO

transmission.

Configuration mode 2

Configuration mode 2 main function is as follows:



Set the latch time for FENx input

The SPI message definition for MOSI commands and MISO responses in this mode are

defined below.

Bits [D9:D8]

Bits are used to set the period of the FEN latch timer. The device has

4 independent timers. A valid FENx input will start the pulse stretch

timer. These bits will set the timer duration. These values default to

‘00’ after a POR event.

Deployment commands

The deployment mode is used to activate the drivers. Two consecutive commands are

required to activate the drivers. Any combination of channels can be fired as long as the

prerequisite conditions are met as indicated in the previous section.

MSB

LSB

D15

D14

D13

D12

D11

D10

MOSI Command for Configuration Mode 2

R/W

Latch bits

MISO Response for Configuration Mode 2

R/W

Latch bits

Table 18. Configuration mode 2

Bit

MOSI command

MISO response

State

Description

D15

Mode bits

See above

D14

See above

D13

Odd Parity – Includes all 16 bits

D12

Read (default) - When D12=’0’ bits D11

to D0 are ignored

R/W bit

Write – FEN latch programming

D11

D10

00 = 0ms

01 = 128ms

10 = 256ms

11 = 512ms

FEN latch time

Internal Stored Value FEN latch

bits

D7 – D0

See above

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