參數(shù)資料
型號(hào)： ISP1520
廠商： NXP Semiconductors N.V.
英文描述： Hi-Speed Universal Serial Bus hub controller
中文描述： 高速通用串行總線控制器樞紐
文件頁數(shù)： 15/51頁
文件大小： 259K
代理商： ISP1520
Philips Semiconductors
ISP1520
Hi-Speed USB hub controller
Product data
Rev. 02 — 04 May 2004
15 of 51
9397 750 11689
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
The detection of any non-removable port sets the hub descriptor into a compound
hub.
9.1.5
Port indicator support
The port indicator support can be disabled by grounding all green port indicators (all
pins GRNn_N); see
Table 9
. This is a global feature. It is not possible to disable port
indicators for only one port.
9.2 Device descriptors and string descriptors settings using I
2
C-bus
9.2.1
Background information on I
2
C-bus
The I
2
C-bus is suitable for bi-directional communication between ICs or modules. It
consists of two bi-directional lines: SDA for data signals and SCL for clock signals.
Both these lines must be connected to a positive supply voltage through a pull-up
resistor.
The basic I
2
C-bus protocol is defined as:
Data transfer is initiated only when the bus is not busy.
Changes in the data line occur when the clock is LOW and must be stable when
the clock is HIGH. Any changes in data lines when the clock is HIGH will be
interpreted as control signals.
Different conditions on I
2
C-bus:
The I
2
C-bus protocol defines the following
conditions:
Not busy —
both SDA and SCL remain HIGH
START —
a HIGH-to-LOW transition on SDA, while SCL is HIGH
STOP —
a LOW-to-HIGH transition on SDA, while SCL is HIGH
Data valid —
after a START condition, data on SDA must be stable for the duration of
the HIGH period of SCL.
Data transfer:
The master initiates each data transfer using a START condition and
terminates it by generating a STOP condition. To facilitate the next byte transfer, each
byte of data must be acknowledged by the receiver. The acknowledgement is done by
pulling the SDA line LOW on the ninth bit of the data. An extra clock pulse needs to
be generated by the master to accommodate this bit.
For more detailed information on the operation of the bus, refer to The I
2
C-bus
specification
Table 8:
AMBn_N (n = 1 to 4)
Ground
Pull-up with amber LED
Non-removable port pin configuration
Non-removable port
non-removable
removable
Table 9:
GRN1_N to GRN4_N
Ground
LED pull-up green LED for at least one port
Port indicator support: pin configuration
Port indicator support
not supported
supported
相關(guān)PDF資料
PDF描述
ISP1520BD Hi-Speed Universal Serial Bus hub controller
ISP1521 Hi-Speed Universal Serial Bus hub controller
ISP1521BE Hi-Speed Universal Serial Bus hub controller
ISP1561 ISP1561BM
ISP1561BM ISP1561BM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISP1520BD 功能描述:IC USB HUB CONTROLLER HS 64-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 應(yīng)用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2
ISP1520BD,518 功能描述:USB 接口集成電路 USB2 4 PORT HUB RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1520BD,551 功能描述:USB 接口集成電路 USB2 4-PORT HUB CTRLR RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1520BD,557 功能描述:USB 接口集成電路 DO NOT USE ORDER -S OR -T PART RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1520BD518 制造商:ST-Ericsson 功能描述:IC CONTROLLER USB HUB 64-LQFP
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