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Revision 1.07

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AS1130

Datasheet - R e g i s t e r D e s c r i p t i o n

I²C Interface Monitoring Register (0x0A)

This register is used to monitor the activity on the I²C bus. If a deadlock situation occurs (e.g. the bus SDA pin is pulled to low and no communi-

cation is possible) the chip will reset the I²C interface and the master is able to start the communication again.

The time window for the reset of the interface of the AS1130 can bes set via 7 bits from 256 s to 33ms. The default setting of this register is

0xFF.

CLK Synchronization Register (0x0B)

The default setting of this register is 0x00.

3

auto_test

0

R/W

The LED open/short test is automatically started at display picture/frame

0: disabled

1: enabled

2

manual_test

0

R/W

The LED open/short test is started manually

0: disabled

1: enabled

1

init

1

R/W

0: initialise control logic (internal State machine is reset again)

1: normal operation

0

shdn

0

R/W

0: device is in shutdown mode (Outputs are turned off, internal State

machine stops)

1: normal operation

Table 24. I²C Interface Monitoring Register Format

0x0A I²C Interface Monitoring Register

Bit

Bit Name

Default

Access

Bit Description

7

-

1

n/a

6:1

Time out window

11111

R/W

Definition of the Time out window (0 to 127 => 1 to 128x256 s)

0000000: 256 s

........

1111111: 32.7ms

0

i2c_monitor

1

R/W

0: I²C monitoring off

1: I²C monitoring on

Table 25. CLK Synchronization Register Format

0x0B CLK Synchronization Register

Bit

Bit Name

Default

Access

Bit Description

7:4

-

0000

n/a

3:2

clk_out

00

R/W

Adjustable clock out frequency

00: 1MHz

01: 500kHz

10: 125kHz

11: 32kHz

Table 23. Shutdown & Open/Short Register Format

0x09 Shutdown & Open/Short Register

Bit

Bit Name

Default

Access

Bit Description