- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄360998 > ISP1123D (NXP SEMICONDUCTORS) Universal Serial Bus compound hub PDF資料下載
參數(shù)資料
| 型號： | ISP1123D |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線控制器 |
| 英文描述： | Universal Serial Bus compound hub |
| 中文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PDSO32 |
| 封裝： | 7.50 MM, PLASTIC, SO-32 |
| 文件頁數(shù)： | 8/49頁 |
| 文件大?。?/td> | 1155K |
| 代理商： | ISP1123D |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當前第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁
Philips Semiconductors
ISP1123
USB compound hub
Preliminary specification
Rev. 01 — 5 October 1999
8 of 49
9397 750 06325
Philips Electronics N.V. 1999. All rights reserved.
[1]
[2]
Symbol names with an overscore (e.g. NAME) indicate active LOW signals.
The voltage at pin V
reg(3.3)
is gated by the RESET pin. This allows fully self-powered operation by
connecting RESET to V
BUS
(+5 V USB supply). If V
BUS
is lost upstream port D+ will not be driven.
See
Table 4 “Mode selection”
.
To disable a downstream port connect both D
+
and D
to V
CC
via a 1 M
resistor; unused ports must
be disabled in reverse order starting from port 5.
Analog detection circuit can be switched off using an external EEPROM, see
Table 23
; in this case,
the pin functions as a logic input (TTL level).
Downstream ports 1 and 2 cannot be disabled.
[3]
[4]
[5]
[6]
7.
Functional description
The ISP1123 is a compound USB hub with up to 5 downstream ports. The number of
ports can be configured between 2 and 5. The downstream ports can be used to
connect low-speed or full-speed USB peripherals. Downstream port 1 is dedicated to
an embedded or non-removable function, the other ports are removable.
All standard USB requests from the host are handled by the hardware without the
need for firmware intervention. The block diagram is shown in
Figure 1
and the basic
architecture of a compound hub in
Figure 2
.
The ISP1123 requires only a single supply voltage. An internal 3.3 V regulator
provides the supply voltage for the analog USB data transceivers.
The ISP1123 supports both bus-powered and self-powered hub operation. When
using bus-powered operation a downstream port cannot supply more than 100 mA to
a peripheral. In case of self-powered operation an external supply is used to power
the downstream ports, allowing a current consumption of max. 500 mA per port.
A basic I
2
C-bus interface is provided for reading vendor ID, product ID and
configuration bits from an external EEPROM upon a reset.
7.1 Analog transceivers
The integrated transceiver interfaces directly to the USB cables through external
termination resistors. They are capable of transmitting and receiving serial data at
both ‘full-speed’ (12 Mbit/s) and ‘low-speed’ (1.5 Mbit/s) data rates. The slew rates
are adjusted according to the speed of the device connected and lie within the range
mentioned in the USB Specification Rev. 1.1
DM2
DP2
PSW1/GL1
[3]
26
27
28
AI/O
AI/O
O
downstream port 2 D
connection (analog)
[6]
downstream port 2 D
+
connection (analog)
[6]
modes 4 to 6
: power switch control output for downstream
port 1 (open-drain, 6 mA)
modes 0 to 3, 7
: GoodLink LED indicator output for
downstream port 1 (open-drain, 6 mA); to connect an LED
use a 330
series resistor
Table 3:
Symbol
[1]
Pin description for LQFP32
…continued
Pin
Type
Description
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| ISP1160 | Embedded Universal Serial Bus Host Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| ISP1130N | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1160 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Embedded Universal Serial Bus Host Controller |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。