LP3925 Datasheet, PDF (32/51 Pages) Texas Instruments – High Performance Power Management Unit for Handset Applications

USB DETECTION DONE
USB DETECTION RESULT
1- USB Charger Detection completed
0 - USB Charger Detection is in progress or charger is disabled or there is no enough
voltage on VIN_CHG.
1 - USB Charger detected
0 - USB host detected
If AUTOMATIC USB DETECTION is enabled (bit is set 1) then
USB Transceiver stays disabled in all circumstances until
USB Charger detection is completed. USB Charger Detection
block gets supply from VTRM. To have detection result cor-
rect then USB_LDO should be enabled
FIGURE 16. USB Transceiver Configured to 3-Pin Interface
DATA
SE0
OE_N
INTERFACE PINS
USB Interface data input/output
USB interface single ended 0 input/output
USB Output Enable, active low
TRUTH TABLE FOR 3-PIN INTERFACE
Transmitting OE_N=0
inputs
outputs
DATA/VP*
SE0/VM*
D+
D-
0
0
0
1
0
1
0
0
1
0
1
0
1
1
0
0
inputs
D+
D-
0
0
0
1
1
0
1
1
Receiving OE_N=1
outputs
DATA/VP*
previous
state
0
1
undefined
30120421
SE0/VM*
1
0
0
0
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