STPM066S datasheet(41/67 Pages) STMICROELECTRONICS

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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, means the state machine moved from RAMPUP 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: buck_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:

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

Bit5 = 1: buck_fail flag ( PG=0 & timer expired) makes state machine from RAMPUP to REC.

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

When FSM2REC is SECUP:

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

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

Bit6 = 1: buck_pgndloss 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: buck_PG=0 or vreg_ot flag makes state machine from ACTIVE to REC.

Bit6 = 1: buck_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.

5.2.21

SPI Device Identification

RESERVED

OTP_DEVICE_IDENTIFICATION

Address

0x21

OTP DEVICE IDENTIFICATION: Digital circuit auto download the information from OTP to this register when chip power up. Read only.

The default value will be all 0 if OTP is not configured.

STPM066S

SPI registers mapping

DS12976 - Rev 2

page 41/67

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