USB 2.0 High-Speed 4-Port Hub Controller

 

 

 

 

 

Datasheet

 

 

Table 3.1 USB2514 Pin Descriptions (continued)

 

 

 

 

 

 

 

 

 

 

BUFFER

 

SYMBOL

36 QFN

48 QFN

 

TYPE

DESCRIPTION

 

 

 

 

 

 

RBIAS

35

47

 

I-R

USB Transceiver Bias

 

 

 

 

 

A 12.0kΩ (+/- 1%) resistor is attached from ground to

 

 

 

 

 

this pin to set the transceiver’s internal bias settings.

 

 

 

 

 

 

 

 

 

SERIAL PORT INTERFACE

 

 

 

 

 

 

SDA/

22

29

 

I/OSD12

Serial Data / SMB Data & Port Non Removable Strap

SMBDATA/

 

 

 

 

Option

NON_REM1

 

 

 

 

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 [4:1]

 

 

 

 

 

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/

24

31

 

I/OSD12

Serial Clock (SCL)

 

 

 

 

 

 

SMBCLK/

 

 

 

 

SMBus Clock (SMBCLK)

 

 

 

 

 

 

CFG_SEL0

 

 

 

 

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/

25

32

 

I/O12

High-Speed Upstream port indictor & Configuration

CFG_SEL1

 

 

 

 

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".

 

 

 

 

 

 

Revision 1.98 (11-19-07)

12

SMSC USB2514

 

DATASHEET