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AS3647/47B
Datasheet, Confidential - D e t a 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
Defines if the STROBE input is edge or level sensitive; see
also bit strobe_on (page 27)
6
strobe_type
1
R/W
0
STROBE input is edge sensitive
1
STROBE input is level sensitive
Enables the STROBE input
7
strobe_on
1
R/W
0
STROBE input disabled
1
STROBE input enabled
in flash mode
Table 14. Fault Register
Fault Register
Addr: 8
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
0 No
1
Yes
1
2
reserved
reserved
0
0
R
R
reserved - don’t use
reserved - don’t use
3
fault_txmask
0
R/sC
1
0
TXMASK/TORCH event triggered during flash - see
TXMASK event occurred on page 14
No
1
Yes
see Flash Timeout on page 14
4
fault_timeout
0
R/sC
1
0
No fault
1
Flash timeout exceeded
see Overtemperature Protection on page 14
5
fault_overtemp
0
R/sC
1
0
No fault
1
Junction temperature limit has been exceeded
see Short Circuit Protection on page 14
6
fault_led_short
0
R/sC
1
0
No fault
1
A shorted LED is detected (pin LED_OUT1/2)
see Overvoltage Protection on page 13
7
fault_ovp
0
R/sC
1
0
No fault
1
An overvoltage condition is detected (pin VOUT)
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