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AS3693B
austria micro systems
7.1.2 Voltage fault registers
In this registers an open or short led fault can be detected. If an open or short led error occurs, pin fault is pulled
to 0 (3 ms debounced ).
Remark: At 100% PWM duty cycle, short led fault detection is not available. Please set PWM to 99% duty cycle.
Open led fault detection is available at 100% PWM duty cycle.
Table 8 – Fault Registers
Addr: 09h-0ch
Voltage Fault 1,2,3,4
This register shows a fault on any led string
Bit
Bit Name
Default
Access
Description
Fault_Reg 1
Shows a error on any led string
1:0
Fault_Reg 5
Fault_Reg 9
00
R
00 = no fault
01 = open led
Fault_Reg 13
Fault_Reg 2
10 = short led
Shows a error on any led string
3:2
Fault_Reg 6
Fault_Reg 10
00
R
00 = no fault
01 = open led
Fault_Reg 14
Fault_Reg 3
10 = short led
Shows a error on any led string
5:4
Fault_Reg 7
Fault_Reg 11
00
R
00 = no fault
01 = open led
Fault_Reg 15
10 = short led
7:6
Fault_Reg 4
Fault_Reg 8
Fault_Reg 12
00
R
Shows a error on any Led string
00 = no Fault
01 = open Led
Fault_Reg 16
10 = short Led
7.2
Curreg 1-16
Each current source can be turned on and off separately.
Table 9 –Reg. Control 1
Addr: 01h
Reg. Control1
This register enables or disables the curreg 1 - 8
Bit
Bit Name
Default
Access
Description
Enables or disables the current regulators
7:0
Curreg 1-8_ON
R/W
0 = regulator off
1 = regulator on
Table 10– Reg.Control 2
Addr: 02h
Reg. Control2
This Register enables or disables the curreg 9-16
Bit
Bit Name
Default
Access
Description
Enables or disables the current regulators
7:0
Curreg 9 -16_ON
R/W
0 = regulator off
1 = regulator on
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