LTC4280

24

4280f

APPLICATIONS INFORMATION

Table 2. CONTROL Register A (00h)—Read/Write

BIT

NAME

OPERATION

A7:6

GPIO Configure

FUNCTION

A6

A7

GPIO PIN

Power Good (Default)

0

0

GPIO = C3

Power Good

0

1

GPIO = C3

General Purpose Output

1

0

GPIO = B6

General Purpose Input

1

1

C6 = GPIO

A5

Test Mode Enable

Enables Test Mode to Disable the ADC; 1 = ADC Disable, 0 = ADC Enable (Default)

A4

Mass Write Enable Allows Mass Write Addressing; 1 = Mass Write Enabled (Default), 0 = Mass Write Disabled

A3

FET On Control

On Control Bit Latches the State of the ON Pin at the End of the Debounce Delay; 1 = FET On, 0 = FET Off

A2

Overcurrent

Auto-Retry

Overcurrent Auto-Retry Bit; 1 = Auto-Retry After Overcurrent, 0 = Latch Off After Overcurrent

A1

Undervoltage

Auto-Retry

Undervoltage Auto-Retry; 1 = Auto-Retry After Undervoltage (Default), 0 = Latch Off After Undervoltage

A0

Overvoltage

Auto-Retry

Overvoltage Auto-Retry; 1 = Auto-Retry After Overvoltage (Default), 0 = Latch Off After Overvoltage

Table 3. ALERT Register B (01h)—Read/Write

BIT

NAME

OPERATION

B7

Reserved

Not Used

B6

GPIO Output

Output Data Bit to GPIO Pin when Configured as Output. Defaults to 0

B5

FET Short Alert

Enables Alert for FET Short Condition; 1 = Enable Alert, 0 = Disable Alert (Default)

B4

EN State

Change Alert

Enables Alert when EN Changes State; 1 = Enable Alert, 0 Disable Alert (Default)

B3

Power Bad

Alert

Enables Alert when Output Power is Bad; 1 = Enable Alert, 0 Disable Alert (Default)

B2

Overcurrent

Alert

Enables Alert for Overcurrent Condition; 1 = Enable Alert, 0 Disable Alert (Default)

B1

Undervoltage

Alert

Enables Alert for Undervoltage Condition; 1 = Enable Alert, 0 Disable Alert (Default)

B0

Overvoltage

Alert

Enables Alert for Overvoltage Condition; 1 = Enable Alert, 0 Disable Alert (Default)