Datasheet

TPS65930/TPS65920
www.ti.com SWCS037G–MAY 2008–REVISED APRIL 2011
7.1.4.3 CEA/UART Driver
Table 7-7 lists the characteristics of the CEA/UART driver.
Table 7-7. CEA/UART Driver
Parameter Comments Min Typ Max Unit
UART Driver CEA
Phone UART edge rates t
PH_UART_EDGE
DP_PULLDOWN asserted 1 μs
Serial interface output high V
OH_SER
ISOURCE = 4 mA 2.4 3.3 3.6 V
Serial interface output low V
OL_SER
ISINK = –4 mA 0 0.1 0.4 V
Carkit Pulse Driver
Pulse match tolerance QPLS_MTCH ZCR_SPKR_IN = 60 kΩ at f = 1 kHz 5%
Phone D– interrupt pulse
t
PH_PLS_POS
ZCR_SPKR_IN = 60 kΩ at f = 1 kHz 200 600 ns
width
Phone positive pulse voltage V
PH_PLS_POS
ZCR_SPKR_IN = 60 kΩ at f = 1 kHz 2.8 3.6 V
7.1.4.4 Pullup/Pulldown Resistors
Table 7-8 lists the characteristics of pullup/pulldown resistors.
Table 7-8. Pullup/Pulldown Resistors
Parameter Comments Min Typ Max Unit
Pullup Resistors
Bus pullup resistor on upstream
R
PUI
Bus idle 0.9 1.1 1.575
port (idle bus)
kΩ
Bus pullup resistor on upstream
R
PUA
Bus driven/driver outputs unloaded 1.425 2.2 3.09
port (receiving)
High (floating) V
IHZ
Pullups/pulldowns on DP and DM lines 2.7 3.6 V
Phone D+ pullup voltage V
PH_DP_UP
Driver outputs unloaded 3 3.3 3.6 V
Pulldown Resistors
R
PH_DP_DWN
Phone D+/– pulldown Driver outputs unloaded 14.25 18 24.8 kΩ
R
PH_DM_DWN
High (floating) V
IHZ
Pullups/pulldowns on DP and DM lines 2.7 3.6 V
D+/– Data Line
Upstream facing port C
INUB
[1.0] 22 75 pF
OTG device leakage V
OTG_DATA_LKG
[2] 0.342 V
Input impedance exclusive of Driver outputs unloaded (waiver from
Z
INP
80 120 kΩ
pullup/pulldown
(1)
USB.ORG Standard Committee)
(1) Waiver received from usb.org standards committee on ZINP 300kmin specification
7.1.5 OTG Electrical Characteristics
The OTG block integrates three main functions:
• The USB plug detection function on VBUS and ID
• The ID resistor detection
• The VBUS level detection
Copyright © 2008–2011, Texas Instruments Incorporated USB Transceiver 75
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