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