USB2517I datasheet(13/58 Pages) MICROCHIP

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 2013-2016 Microchip Technology Inc.

DS00001598B-page 13

USB2517/USB2517I

Serial Port Interface

SDA/

SMBDATA/

NON_REM1

I/OSD12

Serial Data / SMB Data

NON_REM1: Non-removable port strap option.

If this strap is enabled by package and configuration settings (see

Table 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

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, "USB2517I SMBUS or EEPROM Interface

Behavior".

HS_IND/

CFG_SEL1

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,

"USB2517I SMBUS or EEPROM Interface Behavior".

CFG_SEL2

Configuration Programming Select

This pin is not available in all packages; it is held to a logic ‘0’ when

not available.

The logic state of this pin is internally latched on the rising edge of

RESET_N (RESET_N negation), and will determine the hub con-

figuration method as described in Table 5-2, "USB2517I SMBUS

or EEPROM Interface Behavior".

TABLE 5-1:

USB2517/USB2517I PIN DESCRIPTIONS (CONTINUED)

Symbol

64 QFN

Buffer Type

Description

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