L9659 datasheet(33/51 Pages) STMICROELECTRONICS

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L9659

Functional description

Doc ID 022048 Rev 2

33/51

Configuration commands

Configuration mode 1

Configuration mode 1 main functions are as follows:

●

Set Deployment current for all channels. All channels will be either set to 1.2A/2ms,

1.5A/2ms (Maximum VRESx Voltage limited to 25V) 1.75A/1ms or 1.75A/0.65ms

●

Perform a software reset

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

defined below.

Bit [D9:D8]

Bits used to set the firing current/time for all channels. The default state

is ‘00’ (1.2A/2ms min.)

Bits [D7:D0]

The soft reset for the L9659, which includes deployment

driver/diagnostics, is achieved by writing 0xAA and 0x55 within two

MSB

LSB

D15

D14

D13

D12

D11

D10

MOSI Command for configuration Mode 1

R/W

SWR

CL Set bits

Software Reset Sequence bits

MISO Response for configuration Mode 1 (Except for Soft Reset/D11=1 and appropriate pattern)

R/W

SWR

CL Set bits

Table 16.

Configuration mode 1

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 – Allows Soft reset and

deployment programming

D11

Sets Deployment Condition for ALL

channels - When D11=’0’ bits D7 to D0

are ignored

See above

Soft Reset Sequence – bits D8 and D9

are ignored

D10

See above

Sets Deployment Conditions

00 = 1.2A/2ms (Default)

01 = 1.5A/2ms

10 = 1.75A/0.65ms

11 = 1.75A/1ms

Internal Stored Value CL bits

D7 – D2

Software Reset-sequence

See above

see above

See above

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