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參數資料
| 型號： | ISP1123 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Universal Serial Bus compound hub |
| 中文描述： | 通用串行總線復合樞紐 |
| 文件頁數： | 1/49頁 |
| 文件大小： | 1155K |
| 代理商： | ISP1123 |
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ISP1123
Universal Serial Bus compound hub
Rev. 01 — 5 October 1999
Preliminary specification
c
c
1.
General description
The ISP1123 is a compound Universal Serial Bus (USB) hub device which complies
with USB Specification Rev. 1.1 It integrates a Serial Interface Engine (SIE), hub
repeater, hub controller, USB data transceivers and a 3.3 V voltage regulator. It has a
configurable number of downstream ports, ranging from 2 to 5, with one port
dedicated to an embedded or non-removable function.
The ISP1123 can be bus-powered, self-powered or hybrid-powered. When it is
hybrid-powered the hub functions are powered by the upstream power supply (V
BUS
),
but the downstream ports are powered by an external 5 Volt supply. The low power
consumption in ‘suspend’ mode allows easy design of equipment that is compliant
with the ACPI, OnNow and USB power management requirements.
The ISP1123 has built-in overcurrent sense inputs, supporting individual and ganged
mode overcurrent protection for downstream ports. All ports (including the hub) have
GoodLink indicator outputs for easy visual monitoring of USB traffic. The ISP1123
has a serial I
2
C-bus interface for external EEPROM access and a reduced frequency
(6 MHz) crystal oscillator. These features allow significant cost savings in system
design and easy implementation of advanced USB functionality into PC peripherals.
2.
Features
I
High performance USB hub device with integrated hub repeater, hub controller,
Serial Interface Engine (SIE), data transceivers and 3.3 V voltage regulator
I
Complies with Universal Serial Bus Specification Rev. 1.1and ACPI, OnNow and
USB power management requirements
I
Downstream port 1 dedicated to a non-removable function, correctly reported in
the related descriptors
I
Configurable from 2 to 5 downstream ports with automatic speed detection
I
Internal power-on reset and low voltage reset circuit
I
Supports bus-powered, hybrid-powered and self-powered application
I
Individual or global power switching for downstream ports
I
Individual or ganged port overcurrent protection with built-in sense circuits
I
6 MHz crystal oscillator with on-chip PLL for low EMI
I
Visual USB traffic monitoring (GoodLink) for hub and downstream ports
I
I
2
C-bus interface to read vendor ID, product ID and configuration bits from
external EEPROM
相關PDF資料 |
PDF描述 |
|---|---|
| ISP1123D | Universal Serial Bus compound hub |
| ISP1123NB | Universal Serial Bus compound hub |
| ISP1130 | Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130DL | Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130N | Universal Serial Bus compound hub with integrated keyboard controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISP1123BD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub |
| ISP1123D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub |
| ISP1123NB | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub |
| ISP1130 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130DL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
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