SMSC USB2513, Техническое описание

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USB 2.0 High-Speed 3-Port Hub Controller
Datasheet
Revision 1.98 (11-19-07) 12 SMSC USB2513
DATASHEET
RBIAS 35 47 I-R USB Transceiver Bias
A 12.0k
Ω
(+/- 1%) resistor is attached from ground to
this pin to set the transceiver’s internal bias settings.
SERIAL PORT INTERFACE
SDA/
SMBDATA/
NON_REM1
22 29 I/OSD12 Serial Data / SMB Data & Port Non Removable Strap
Option
NON_REM1: Non removable port strap option.
If this strap is enabled by package and configuration
settings (see
Table 3.2 ), this pin will be sampled (in
conjunction with LOCAL_PWR/SUSP_IND/NON_REM0)
at RESET_N negation to determine if imports [3:1]
contain permanently attached (non-removable) devices:
NON_REM[1:0] = ‘00’, All ports are removable,
NON_REM[1:0] = ‘01’, Port 1 is nonremovable,
NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable,
NON_REM[1:0] = ‘11’, Ports 1, 2 & 3 are non-removable
SCL/
SMBCLK/
CFG_SEL0
24 31 I/OSD12 Serial Clock (SCL)
SMBus Clock (SMBCLK)
Configuration Select_SEL0: The logic state of this
multifunction pin is internally latched on the rising edge
of RESET_N (RESET_N negation), and will determine
the hub configuration method as described in
Table 3.2,
"SMBus or EEPROM Interface Behavior" .
HS_IND/
CFG_SEL1
25 32 I/O12 High-Speed Upstream port indictor & Configuration
Programming Select
HS_IND: High Speed Indicator for upstream port
connection speed.
The active state of the LED will be determined as
follows:
CFG_SEL1 = ‘0’,
HS_IND is active high,
CFG_SEL1 = ‘1’,
HS_IND is active low,
‘Asserted’ = Hub is connected at HS
‘Negated’ = Hub is connected at FS
CFG_SEL1: The logic state of this pin is internally
latched on the rising edge of RESET_N (RESET_N
negation), and will determine the hub configuration
method as described in
Table 3.2, "SMBus or EEPROM
Interface Behavior" .
Table 3.1 USB2514 Pin Descriptions (continued)
SYMBOL 36 QFN 48 QFN
BUFFER
TYPE DESCRIPTION