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LTC4222
26
4222fb
APPLICATIONS INFORMATION
Table 5. STATUS Registers C  Read
BIT   STATUS 1 (D2h)
STATUS 2 (D6h)
OPERATION
7  FET On
FET On
1 = FET On, 0 = FET Off
6    GPIO1 Input
GPIO2 Input
Reports the State of the GPIO1
Pin 1 = GPIO1 High, 0 = GPIO1 Low
5    Channel 1 FET Short Status
Channel 2 FET Short Status
Reports the State of the GPIO2
Pin 1 = GPIO2 High, 0 = GPIO2 Low
4    EN1 Status
EN2 Status
Indicates If the Channel is Enabled When EN is Low
1 = EN pin Low, 0 = EN pin High
3    Channel 1 Power Bad
Channel 2 Power Bad
Indicates Power is Bad When FB is Low
1 = FB Low, 0 = FB High
2    Channel 1 Overcurrent
Channel 2 Overcurrent
Indicates Overcurrent Condition; 1 = Overcurrent, 0 = Not Overcurrent
1    Channel 1 Undervoltage
Channel 2 Undervoltage
Indicates Input Undervoltage When UV is Low
1 = UV Low, 0 = UV High
0    Channel 1 Overvoltage
Channel 2 Overvoltage
Indicates Input Overvoltage When OV is High
1 = OV High, 0 = OV Low
Table 6. FAULT Registers D  Read/Write
BIT   FAULT 1 (D3h)
FAULT 2 (D7h)
OPERATION
7    Reserved
Reserved
Reserved
6    Reserved
Reserved
Reserved
5    Channel 1 FET Short Fault
Occurred
Channel 2 FET Short Fault
Occurred
Indicates Potential FET Short was Detected When Measured Current
Sense Voltage Exceeded 1mV While FET was Off
1 = FET was Shorted, 0 = FET is Good
4    Channel 1 EN Changed State
Channel 2 EN Changed State
Indicates That the LTC4215-1 was Enabled or Disabled When EN
Changed State
1 = EN Changed State, 0 = EN Unchanged
3    Channel 1 Power Bad Fault
Occurred
Channel 2 Power Bad Fault
Occurred
Indicates Power was Bad When FB Went Low
1 = FB was Low, 0 = FB was High
2    Channel 1 Overcurrent Fault
Occurred
Channel 2 Overcurrent Fault
Occurred
Indicates Overcurrent Fault Occurred
1 = Overcurrent Fault Occurred, 0 = No Overcurrent Faults
1    Channel 1 Undervoltage Fault
Occurred
Channel 2 Undervoltage Fault
Occurred
Indicates Input Undervoltage Fault Occurred When UV Went Low
1 = UV was Low, 0 = UV was High
0    Channel 1 Overvoltage Fault
Occurred
Channel 2 Overvoltage Fault
Occurred
Indicates Input Overvoltage Fault Occurred When OV Went High
1 = OV was High, 0 = OV was Low
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