Datasheet

USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
SMSC USB2517 13 Revision 2.8 (09-17-12)
DATASHEET
OCS[7:1]_N 37
38
35
21
22
27
28
IPU Over-current Sense
Input from external current monitor indicating an over-current
condition.
{Note: Contains internal pull-up to 3.3V supply}
RBIAS 63 I-R USB Transceiver Bias
A 12.0k
Ω (+/- 1%) resistor is attached from the ground to this pin
to set the transceiver’s internal bias settings.
SERIAL PORT INTERFACE
SDA/
SMBDATA/
NON_REM1
40 I/OSD12 Serial Data / SMB Data
NON_REM1: Non-removable port strap option.
If this strap is enabled by package and configuration settings (see
Ta b l e 5. 2) this pin will be sampled (in conjunction with
SUSP_IND/LOCAL_PWR/NON_REM0) at RESET_N negation to
determine if ports [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 non-removable,
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
41 I/OSD12 Serial Clock (SCL)
SMBus Clock (SMBCLK)
Configuration Select_SEL0: The logic state of this multifunctional
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 5.2, "USB2517 SMBUS or
EEPROM Interface Behavior".
HS_IND/
CFG_SEL1
42 I/O12 Hi-Speed Upstream port indicator & 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 5.2,
"USB2517 SMBUS or EEPROM Interface Behavior".
Table 5.1 USB2517 Pin Descriptions (continued)
SYMBOL 64 QFN
BUFFER
TYPE DESCRIPTION