LTC4222
25
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錑ood
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
1 = Enable Alert, 0 = Disable Alert (Default)
4 EN1 State Change Alert
EN2 State Change Alert
Enables Alert When EN Changes State
1 = Enable Alert, 0 = Disable Alert (Default)
3 Channel 1 Power Bad Alert
Channel 2 Power Bad Alert
Enables Alert When Output Power is Bad
1 = Enable Alert, 0 = Disable Alert (Default)
2 Channel 1 Overcurrent Alert
Channel 2 Overcurrent Alert
Enables Alert for Overcurrent Condition
1 = Enable Alert, 0 = Disable Alert (Default)
1 Channel 1 Undervoltage Alert
Channel 2 Undervoltage Alert
Enables Alert for Undervoltage Condition
1 = Enable Alert, 0 = Disable Alert (Default)
0 Channel 1 Overvoltage Alert
Channel 2 Overvoltage Alert
Enables Alert for Overvoltage Condition
1 = Enable Alert, 0 = Disable Alert (Default)