USB2507 データシートの表示（PDF） - Microchip Technology

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USB2507

Integrated USB 2.0 Compatible 7-Port Hub

Microchip Technology 

USB2507

TABLE 4-1: 7-PORT HUB PIN DESCRIPTIONS (CONTINUED)

Name

Symbol

Type

Function

7-PORT USB 2.0 HUB INTERFACE

High-Speed USB

Data

USB Power Enable

USBDN[7:1]

USBDP[7:1]

PRTPWR[7:1]

IO-U

O12

These pins connect to the downstream USB peripheral

devices attached to the Hub’s ports.

Enables power to USB peripheral devices (downstream).

Ports [7:5] Green

LED

Port 4:3 Green

LED

&

Port Disable

strapping option.

GR[7:5]

GR[4:3]/

PRT_DIS[1:0]

I/O12

I/O12

The active signal level of the PRTPWR7:1 pins is determined

by the Power Polarity Strapping function of the

PRTPWR_POL pin.

Green indicator LED’s for ports[7:5]. LED is active low

Green indicator LED for ports 4 and 3. Will be active low

when LED support is enabled via EEPROM or SMBus.

If the hub is configured by the internal default configuration,

these pins will be sampled at RESET_N negation to

determine if ports [7:5] will be permanently disabled. Also, the

active state of the LED’s will be determined as follows:

PRT_DIS[1:0] = ‘00’, All ports are enabled,

GR4 is active high,

GR3 is active high.

PRT_DIS[1:0] = ‘01’, Port 7 is disabled,

GR4 is active high,

GR3 is active low.

PRT_DIS[1:0] = ‘10’, Ports 7 & 6 are disabled,

GR4 is active low,

GR3 is active high.

Port [2:1] Green

LED

&

Port Non-

Removable

strapping option.

GR[2:1]/

NON_REM[1:0]

I/O12

PRT_DIS[1:0] = ‘11’, Ports 7, 6 & 5 are disabled,

GR4 is active low,

GR3 is active low.

Green indicator LED for ports 2 and 1. Will be active low

when LED support is enabled via EEPROM or SMBus.

If the hub is configured by the internal default configuration,

these pins will be sampled at RESET_N negation to

determine if ports [3:1] contain permanently attached (non-

removable) devices. Also, the active state of the LED’s will be

determined as follows:

NON_REM[1:0] = ‘00’, All ports are removable,

GR2 is active high,

GR1 is active high.

NON_REM[1:0] = ‘01’, Port 1 is non-removable,

GR2 is active high,

GR1 is active low.

NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable,

GR2 is active low,

GR1 is active high.

Ports [7:5] Amber

LED

AM[7:5]

I/O12

NON_REM[1:0] = ‘11’, Ports 1, 2, & 3 are non-removable,

GR2 is active low,

GR1 is active low.

Amber indicator LED’s for ports [7:5], LED is active low.

DS000002251A-page 8

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