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PDF AU9254R2 Data sheet ( Hoja de datos )
| Número de pieza | AU9254R2 | |
| Descripción | USB Hub Controller | |
| Fabricantes | Alcor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AU9254R2 (archivo pdf) en la parte inferior de esta página. Total 31 Páginas | ||
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AU9254 R2
USB Hub Controller
Technical Reference Manual
Revision 1.0
© 2000-2002 Alcor Micro Corp.
All Rights Reserved
1 page  
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1.0 Introduction
1.1. Description
The AU9254 is an integrated single chip USB hub controller designed for the emerging
industry-standard Universal Serial Bus (USB). The AU9254 supports four USB
downstream ports. Each downstream port has power switch control, and over-current
sensing.
Single chip integration makes the AU9254 the most cost effective stand-alone USB hub
solution available in the market. Downstream ports can be used to connect various USB
peripheral devices, such as USB printers, modems, scanners, cameras, mice, or joysticks to
the system without adding external glue logic.
1.2. Features
• Fully compliant with the Universal Serial Bus Specification, version 1.1.
• USB hub design is compliant with Universal Serial Bus Hub Specification, revision
1.1.
• Single chip integrated USB hub controller with embedded proprietary processor.
• Supports four bus-powered/self-powered downstream ports.
• Built-in 3.3v voltage regulator allows single +5V operating voltage, resulting in
reduced overall system cost.
• Runs at 12Mhz frequency.
• Available in 28-pin SSOP.
INTRODUCTION
1
5 Page 
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Table 3-1 (continued). Pin Description for the 28-pin SSOP
Pin # Pin Name
15 DP1_OVRCUR
16 SUSPEND
17 DP2_OVRCUR
18 NC
19 AGND/GNDO
20 XTAL_1
21 XTAL_2
22 DP3_PWRUP
23 DP4_OVRCUR
24 DP3_OVRCUR
25 USB_DM
26 USB_DP
27 USB1_DM
28 USB1_DP
I/O Description
I Downstream port 1 over-current indicator. Active low.
O Device is in suspended state: Active high.
I Downstream port 2 over-current indicator. Active low.
PWR +5 V power supply.
I Crystal in.
O Crystal out.
O Downstream port 3 power switch control. Active low.
I Downstream port 4 over-current indicator. Active low.
I Downstream port 3 over-current indicator. Active low.
I/O USB D- for upstream.
I/O USB D+ for upstream port. Need external 1.5KΩ pull-
up to 3.3V.
I/O USB D- for downstream port 1; add 15KΩ pull-down to
ground.
I/O USB D+ for downstream port 1; add 15KΩ pull-down to
ground.
PIN ASSIGNMENT
7
11 Page | ||
| Páginas | Total 31 Páginas | |
| PDF Descargar | [ Datasheet AU9254R2.PDF ] | |
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