Datasheet

LTC4222

4222fb

APPLICATIONS INFORMATION

Table 3. CONTROL Registers A – Read/Write

BIT CONTROL 1 (D0h) CONTROL 2 (D4h) OPERATION

7:6 GPIO1 Conﬁgure GPIO2 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 = A5

General Purpose Input 1 1 C6 = GPIO

5 GPIO1 Output GPIO2 Output Output Data for GPIO Pins When Conﬁgured as General Purpose Output

1 = High Impedance, 0 = Pulled Low

4 Reserved Mass Write Enable Allows Mass Write Addressing

1 = Mass Write Enabled (Default), 0 = Mass Write Disabled

3 Channel 1 FET On Control Channel 2 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

2 Channel 1 Overcurrent Auto-Retry Channel 2 Overcurrent Auto-Retry Overcurrent Auto-Retry Bit

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

(Default)

1 Channel 1 Undervoltage Auto-Retry Channel 2 Undervoltage Auto-Retry Undervoltage Auto-retry

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

Undervoltage

0 Channel 1 Overvoltage Auto-Retry Channel 2 Overvoltage Auto-Retry Overvoltage Auto-retry

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

Overvoltage

Table 4. ALERT Registers B – Read/Write

BIT ALERT 1 (D1h) ALERT 2 (D5h) OPERATION

7 Reserved Reserved Not Used

6 Reserved Reserved Not Used

5 Channel 1 FET Short Alert Channel 2 FET Short Alert Enables Alert for FET Short Condition