USB2512 SMSC Corporation, USB2512 Datasheet - Page 9

• Manufacturer Part Number: USB2512
• Description: USB 2.0 High-Speed 2-Port Hub Controller
• Manufacturer: SMSC Corporation

Revision 1.92 (11-28-07)
NON_REM1
CFG_SEL0
CFG_SEL1
SMBDATA/
SMBCLK/
SYMBOL
HS_IND/
XTAL1/
CLKIN
SDA/
SCL/
QFN-36
EMB
22
24
25
33
Table 3.1 USB2512 Pin Descriptions (continued)
BUFFER
I/OSD12
I/OSD12
ICLKx
TYPE
I/O12
SERIAL PORT INTERFACE
DATASHEET
Serial Data / SMB Data & Port Non Removable Strap Option
Serial Clock (SCL)
High-Speed Upstream port indictor & Configuration
Crystal Input/External Clock Input
NON_REM1: Non removable port strap
option.
If this strap is enabled by package and configuration settings
(see
with LOCAL_PWR/SUSP_IND/NON_REM0) at RESET_N
negation to determine if imports [2:1] 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 are non-removable.
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
Interface
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
24MHz crystal or external clock input.
This pin connects to either one terminal of the crystal or to an
external 24MHz clock when a crystal is not used.
MISC
Table
9
Behavior".
3.2), this pin will be sampled (in conjunction
DESCRIPTION
Table 3.2, "SMBus or EEPROM
USB 2.0 High-Speed 2-Port Hub Controller
Behavior".
SMSC USB2512
Datasheet