Datasheet

LTC4155
37
4155fc
Table 15. USB On-The-Go ID Pin Detection
USB On-The-Go ID PIN DETECTION REG3
SUB ADDRESS 0x03 ID_PIN_DETECT
DIRECTION Read
ID PIN STATUS D7 D6 D5 D4 D3 D2 D1 D0
No Detection 0
ID Pin Shorted to
GND*
1
*LOCKOUT_ID_PIN has no effect on pin detection.
Table 16. USB On-The-Go Enabled Status
USB On-The-Go ENABLED STATUS REG3
SUB ADDRESS 0x03 OTG_ENABLED
DIRECTION Read
STEP-UP REGULATOR
STATUS D7 D6 D5 D4 D3 D2 D1 D0
Step-Up Switching
Regulator Inactive
0
Step-Up Switching
Regulator Active
1
Table 17. NTC Thermistor Status Report
NTC THERMISTOR STATUS REPORT REG3
SUB ADDRESS 0x03 NTCSTAT[1:0]
DIRECTION Read
NTC THERMISTOR
STATUS D7 D6 D5 D4 D3 D2 D1 D0
NTC Normal 0 0
NTC_TOO_COLD 0 1
NTC_TOO_WARM 1 0
NTC_HOT_FAULT 1 1
Table 18. Low Battery Detection
LOW BATTERY DETECTION REG3
SUB ADDRESS 0x03 LOWBAT
DIRECTION Read
BATTERY VOLTAGE
STATUS D7 D6 D5 D4 D3 D2 D1 D0
Normal 0
Low Cell Voltage* 1
*Low cell voltage is only meaningful when input (WALL or USB) power
is available and the battery charger is enabled, or when automatic or
manual enable of the step-up regulator has been requested.
Table 19. External Power (Wall or USB) Available
EXTERNAL POWER (WALL OR USB) AVAILABLE REG4
SUB ADDRESS 0x04 EXT_PWR_GOOD
DIRECTION Read
POWER AVAILABLE
STATUS D7 D6 D5 D4 D3 D2 D1 D0
Battery Power
Only
0
External Power
Available*
1
*Never true when On-The-Go step-up converter is active.
Table 20. USB Input Voltage Valid
USB INPUT VOLTAGE VALID REG4
SUB ADDRESS 0x04 USBSNS_GOOD
DIRECTION Read
USBSNS STATUS D7 D6 D5 D4 D3 D2 D1 D0
USBSNS Voltage
Invalid
0
USBSNS Voltage
Valid*
1
*Will be true with applied input voltage within valid range or On-The-Go
in regulation.
Table 21. WALL Input Voltage Valid
WALL INPUT VOLTAGE VALID REG4
SUB ADDRESS 0x04 WALLSNS_GOOD
DIRECTION Read
WALLSNS STATUS D7 D6 D5 D4 D3 D2 D1 D0
WALLSNS Voltage
Invalid
0
WALLSNS Voltage
Valid
1
Table 22. Input Current Limit Status
INPUT CURRENT LIMIT STATUS REG4
SUB ADDRESS 0x04 AT_INPUT_ILIM
DIRECTION Read
INPUT CURRENT
LIMIT STATUS D7 D6 D5 D4 D3 D2 D1 D0
Input Current Limit Inactive 0
Input Current Limit Active 1
OPERATION