USB2517i-JZX datasheet(25/72 Pages) SMSC

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USB 2.0 Hi-Speed Hub Controller

Datasheet

SMSC USB251x

Revision 1.0 (3-11-09)

DATASHEET

SERIAL PORT INTERFACES

SDA /

SMBDATA /

NON_REM[1]

I/OSD12

Serial Data signal (SDA)

Server Message Block Data signal (SMBDATA)

Non-removable port strap option

If this strap is enabled by package and configuration settings (see Table 8.1),

this pin will be sampled (in conjunction with LOCAL_PWR / SUSP_IND /

NON_REM[0]) at RESET_N negation to determine if ports [7:1] 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’, When available, ports 1 2 & 3 are non-removable.

RESET_N

RESET Input

The system can reset the chip by driving this input low. The minimum active

low pulse is 1

μs.

SCL /

SMBCLK /

CFG_SEL[0]

I/OSD12

Serial Clock (SCL)

System Management Bus Clock (SMBCLK)

Configuration Select: 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 8.1, "Hub

Configuration Options".

HS_IND /

CFG_SEL[1]

I/O12

Hi-Speed Upstream Port Indicator

HS_IND: Hi-speed Indicator for upstream port connection speed.

The active state of the LED will be determined as follows:

CFG_SEL[1] = ‘0’,

HS_IND is active high,

CFG_SEL[1] = ‘1’,

HS_IND is active low,

‘Asserted’ = the hub is connected at HS

‘Negated’ = the hub is connected at FS

Configuration Programming Select

CFG_SEL[1]: 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 8.1, "Hub Configuration Options".

CFG_SEL[2]

Configuration Programming Select

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 8.1, "Hub Configuration Options". When the CFG_SEL[2]

pin is unavailable, then the logic is internally tied to ‘0’.

Table 5.2 USB251x Pin Descriptions (continued)

SYMBOL

BUFFER

TYPE

DESCRIPTION

USB2517i-JZX Datenblatt(PDF) 25 Page - SMSC Corporation

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