LTC4222 Linear Technology, LTC4222 Datasheet - Page 26

• Manufacturer Part Number: LTC4222
• Description: Dual Hot Swap Controller
• Manufacturer: Linear Technology

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LTC4222
APPLICATIONS INFORMATION
Table 3. CONTROL Registers A – Read/Write
BIT
7:6
5
4
3
2
1
0
Table 4. ALERT Registers B – Read/Write
BIT
7
6
5
4
3
2
1
0
26
CONTROL 1 (D0h)
GPIO1 Confi gure
GPIO1 Output
Reserved
Channel 1 FET On Control
Channel 1 Overcurrent Auto-Retry
Channel 1 Undervoltage Auto-Retry Channel 2 Undervoltage Auto-Retry Undervoltage Auto-retry
Channel 1 Overvoltage Auto-Retry
ALERT 1 (D1h)
Reserved
Reserved
Channel 1 FET Short Alert
EN1 State Change Alert
Channel 1 Power Bad Alert
Channel 1 Overcurrent Alert
Channel 1 Undervoltage Alert
Channel 1 Overvoltage Alert
CONTROL 2 (D4h)
GPIO2 Confi gure
GPIO2 Output
Mass Write Enable
Channel 2 FET On Control
Channel 2 Overcurrent Auto-Retry
Channel 2 Overvoltage Auto-Retry
ALERT 2 (D5h)
Reserved
Reserved
Channel 2 FET Short Alert
EN2 State Change Alert
Channel 2 Power Bad Alert
Channel 2 Overcurrent Alert
Channel 2 Undervoltage Alert
Channel 2 Overvoltage Alert
OPERATION
Not Used
Not Used
Enables Alert for FET Short Condition
1 = Enable Alert, 0 = Disable Alert (Default)
Enables Alert When EN Changes State
1 = Enable Alert, 0 = Disable Alert (Default)
Enables Alert When Output Power is Bad
1 = Enable Alert, 0 = Disable Alert (Default)
Enables Alert for Overcurrent Condition
1 = Enable Alert, 0 = Disable Alert (Default)
Enables Alert for Undervoltage Condition
1 = Enable Alert, 0 = Disable Alert (Default)
Enables Alert for Overvoltage Condition
1 = Enable Alert, 0 = Disable Alert (Default)
OPERATION
Output Data for GPIO Pins When Confi gured as General Purpose Output
1 = High Impedance, 0 = Pulled Low
Allows Mass Write Addressing
1 = Mass Write Enabled (Default), 0 = Mass Write Disabled
On Control Bit, Latches the State of the On Pin at the End of the
Debounce Delay
1 = FET On, 0 = FET Off
Overcurrent Auto-Retry Bit
1 = Auto-Retry After Overcurrent, 0 = Latch Off After Overcurrent
(Default)
1 = Auto-Retry After Undervoltage (Default), 0 = Latch Off After
Undervoltage
Overvoltage Auto-retry
1 = Auto-Retry After Overvoltage (Default), 0 = Latch Off After
Overvoltage
FUNCTION
Power Good (Default)
Power⎯Good
General Purpose Output
General Purpose Input
A6
0
0
1
1
A7
0
1
0
1
GPIO = C3
GPIO = C3
GPIO = A5
C6 = GPIO
GPIO PIN
4222f