AL58263

Document number: DS46310 Rev. 4 - 2

21 of 29

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September 2024

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AL58263

Functional Descriptions

– Diagnosis and Protections (continued)

Error Bit

Error Bit

Symbol

Description

0

Error

When errors, such as open errors, short errors, short-to-GND errors, and thermal errors (PreOTP),

are detected in the channel, the error bit, zero, will be loaded into the corresponding image shift

register.

1

Normal

In the detecting mode, the bit, one, will be loaded into the corresponding image shift register if the

device is under normal operating conditions.

LED Open Error Detection

DCK

LAT

DI

Detection

time

IOUT15

Error Bit

IOUT14

Error Bit

IOUT12

Error Bit

IOUT0

Error Bit

DO

: Unknown Data

16

15

14

1

1

2

3

15

2 pulses

IOUT13

Error Bit

14 pulses

DI=DO

When the LED open error detection instruction is executed, it is necessary to input two DI pulses in Error Detection Mode. No matter what the

image latch data is, the output ports of the AL58263 will turn on with 0.1mA for error detection. The detection time is defined from the falling edge

of LAT to the rising edge of the following DCK.

When the voltage of the IOUT pins is below 0.3V, the error bit, zero, will be loaded into the corresponding image shift register. The error bit will be

shifted out from the DO pin on the synchronization of the rising edge of DCK. A retiming DO signal, which is similar to a DI signal, appears when

the LAT signal stays in a high level for cascading applications.