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1.5-4

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AS3647/47B

Datasheet, Confidential - D e ta i l e d D e s c r i p t i o n

1. The MSB bit of this register not used to protect the LED; therefore the maximum assist light current = half the

maximum flash current

Table 13. Strobe Signalling Register

Addr: 7

Strobe Signalling Register

This register defines the flash current reducing and mode for STROBE

Bit

Bit Name

Default Access

Description

6

strobe_type

1R/W

Defines if the STROBE input is edge or level sensitive; see

also bit strobe_on (page 27)

0

STROBE input is edge sensitive

1

STROBE input is level sensitive

7

strobe_on

1R/W

Enables the STROBE input

0

STROBE input disabled

1

STROBE input enabled

in flash mode

Table 14. Fault Register

Addr: 8

Fault Register

This register identifies all the different fault conditions and provide

information about the LED detection

Bit

Bit Name

Default Access

Description

0

fault_uvlo

0

R/sC

1

an undervoltage event has happened - see Current

Reduction by VIN measurements in Flash Mode on page 16

0No

1Yes

1

reserved

0

R

reserved - don’t use

2

reserved

0

R

reserved - don’t use

3

fault_txmask

0

R/sC

1

TXMASK/TORCH event triggered during flash - see

TXMASK event occurred on page 14

0No

1Yes

4

fault_timeout

0

R/sC

1

see Flash Timeout on page 14

0No fault

1

Flash timeout exceeded

5

fault_overtemp

0

R/sC

1

see Overtemperature Protection on page 14

0No fault

1

Junction temperature limit has been exceeded

6

fault_led_short

0

R/sC

1

see Short Circuit Protection on page 14

0No fault

1

A shorted LED is detected (pin LED_OUT1/2)

7

fault_ovp

0

R/sC

1

see Overvoltage Protection on page 13

0No fault

1

An overvoltage condition is detected (pin VOUT)