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參數資料
| 型號： | 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： | 14/51頁 |
| 文件大小： | 259K |
| 代理商： | ISP1520 |
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Philips Semiconductors
ISP1520
Hi-Speed USB hub controller
Product data
Rev. 02 — 04 May 2004
14 of 51
9397 750 11689
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
PSWn_N pins have integrated weak pull-up resistors inside the chip.
9.1.3
Overcurrent protection mode
The ISP1520 supports all overcurrent protection modes: none, global and individual.
No overcurrent protection mode reporting is selected when pin NOOC = HIGH.
Global and individual overcurrent protection modes are selected using pins PSWn_N,
following the power switching modes selection scheme; see
Table 6
.
For the global overcurrent protection mode, only PSW1_N and OC1_N are active;
that is, in this mode, the remaining overcurrent indicator pins are disabled. To inhibit
the analog overcurrent detection, the OC_N pins must be connected to V
REF(5V0)
.
Both analog and digital overcurrent modes are supported; see
Table 7
.
For digital overcurrent detection, the normal digital TTL level is accepted on the
overcurrent input pins. For analog overcurrent detection, the threshold is given in the
DC characteristics. In this mode, to filter out false overcurrent conditions because of
in rush and spikes, a dead time of 15 ms is built into the IC, that is, overcurrent must
persist for 15 ms before it is reported to the host.
9.1.4
Non-removable port
A non-removable port, by definition, is a port that is embedded inside the hub
application box and is not externally accessible. The LED port indicators
(pins AMBn_N) of such a port are not used. Therefore, the corresponding amber LED
port indicators are disabled to signify that the port is non-removable; see
Table 8
.
More than one non-removable port can be specified by appropriately connecting the
corresponding amber LED indicators. At least one port should, however, be left as a
removable port.
Table 5:
Power switching mode
Ganged
Power switching mode: pin configuration
PSW1_N
internal
pull-up
internal
pull-up
PSW2_N
ground
PSW3_N
ground
PSW4_N
ground
Individual
internal
pull-up
internal
pull-up
internal
pull-up
Table 6:
Power switching mode
None
Global
Overcurrent protection mode pin configuration
NOOC
HIGH
LOW
PSW1_N
ground
internal
pull-up
internal
pull-up
PSW2_N
ground
ground
PSW3_N
ground
ground
PSW4_N
ground
ground
Individual
LOW
internal
pull-up
internal
pull-up
internal
pull-up
Table 7:
Pin ADOC
3.3 V
Ground
Overcurrent detection mode selection pin configuration
Mode selection
Description
analog
threshold
V
trip
digital
normal digital TTL level
相關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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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:- 標準包裝:3,000 系列:- 應用: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 供應商設備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產品目錄頁面: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 產品:USB 2.0 數據速率: 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 產品:USB 2.0 數據速率: 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 產品:USB 2.0 數據速率: 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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