AS3693B

austriami crosyst ems

www.austriamicrosystems.com

Revision 1.21 / 2011-09-30

12 - 32

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

1:0

Fault_Reg 1

Fault_Reg 5

Fault_Reg 9

Fault_Reg 13

00

R

Shows a error on any led string

00 = no fault

01 = open led

10 = short led

3:2

Fault_Reg 2

Fault_Reg 6

Fault_Reg 10

Fault_Reg 14

00

R

Shows a error on any led string

00 = no fault

01 = open led

10 = short led

5:4

Fault_Reg 3

Fault_Reg 7

Fault_Reg 11

Fault_Reg 15

00

R

Shows a error on any led string

00 = no fault

01 = open led

10 = short led

7:6

00

R

Shows a error on any Led string

00 = no Fault

01 = open Led

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

7:0

Curreg 1-8_ON

R/W

Enables or disables the current regulators

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

7:0

Curreg 9 -16_ON

R/W

Enables or disables the current regulators

0 = regulator off

1 = regulator on