L5965 datasheet(45/73 Pages) STMICROELECTRONICS

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5.2.22

SPI Silicon Version

FSM_STATUS

FSM2REC

TOREC_REASON_FLAG

SILVERSION

Address

0x20

SILVERSION: read only ("0000" means 'AA' version)

FSM_STATUS: read only

0001: Shutdown

0010: StandBy

0011: INIT

0100: RampUP_Main

0101: Secup

0110: Active

0111: Rec

1000: Test

1001: OTP_Prog

FSM2REC: read & clear. State machine status before going into REC mode.

000: default value after reset release or R&C;

001: INIT, means the state machine moved from INIT mode to REC mode;

010: RAMPUP MAIN, means the state machine moved from RAMPUP MAIN mode to REC mode;

011: SECUP, means the state machine moved from SECUP mode to REC mode;

100: ACTIVE, means the state machine moved from ACTIVE mode to REC mode;

TOREC_REASON_FLAG: read & clear. The reason that make state machine jump to REC.

When FSM2 REC is INIT:

Bit4 = 1: lbist_fail flag makes state machine from INIT to REC.

Bit5 = 1: abist_fail flag makes state machine from INIT to REC.

Bit6 = 1: mbuck_pg_loss flag makes state machine from INIT to REC.

Bit7 = 1: saf_crc_fail flag makes state machine from INIT to REC.

When FSM2REC is RAMPUP MAIN:

Bit4 = 1: lbist_fail flag makes state machine from RAMPUP MAIN to REC.

Bit5 = 1: main_buck_fail flag (main PG=0 & timer expired) makes state machine from RAMPUP MAIN

to REC.

Bit6 = 1: main_buck_pg_loss makes state machine from RAMPUP MAIN to REC.

When FSM2REC is SECUP:

Bit4 = 1: lbist_fail flag makes state machine from SECUP to REC.

Bit5 = 1: mbuck_PG=0 flag makes state machine from SECUP to REC.

Bit6 = 1: mbuck_pg_loss flag makes state machine from SECUP to REC.

Bit7 = 1: vreg_ot flag makes state machine from SECUP to REC.

When FSM2REC is ACTIVE:

Bit4 = 1: lbist_fail flag makes state machine from ACTIVE to REC.

Bit5 = 1: mbuck_PG=0 or vreg_ot flag makes state machine from ACTIVE to REC.

Bit6 = 1: mbuck_pg_loss flag makes state machine from ACTIVE to REC.

Bit7 = 1: SECUP fail=3 flag makes state machine from ACTIVE to REC.

Bit8 = 1: Rstb fail.

L5965

SPI registers mapping

DS12567 - Rev 3

page 45/73

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