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參數資料
| 型號： | ISP1122 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Universal Serial Bus stand-alone hub |
| 中文描述： | 通用串行總線獨立的樞紐 |
| 文件頁數： | 21/48頁 |
| 文件大?。?/td> | 1159K |
| 代理商： | ISP1122 |
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Philips Semiconductors
ISP1122
USB stand-alone hub
Product specification
Rev. 03 — 29 March 2000
21 of 48
9397 750 07002
Philips Electronics N.V. 2000. All rights reserved.
10.2 Hardware connections
Via the I
2
C-bus interface the ISP1122 can be connected to an external EEPROM
(PCF8582 or equivalent). The hardware connections are shown in
Figure 5
.
The SCL and SDA pins are multiplexed with pins OPTION and INDV respectively.
The slave address which ISP1122 uses to access the EEPROM is 1010000B. Page
mode addressing is not supported, so pins A0, A1 and A2 of the EEPROM must be
connected to GND (logic 0).
10.3 Data transfer
When the ISP1122 is reset, the I
2
C-bus interface tries to read 6 bytes of configuration
data from an external EEPROM. If no response is detected, the levels on inputs SDA
and SCL are interpreted as INDV and OPTION to select the operating mode (see
Table 4
).
The data in the EEPROM memory are organized as shown in
Table 22
.
[1]
[2]
Vendor ID code in the Device descriptor, see
Table 10
.
Product ID code in the Device descriptor, see
Table 10
.
Fig 5.
EEPROM connection diagram.
idth
MGR780
INDV/SDA
OPTION/SCL
A1
A2
A0
SDA
SCL
VDD
RP
RP
VDD
ISP1122
USB HUB
PCF8582
EEPROM
or
equivalent
I
2
C-bus
Table 22: EEPROM organization
Address
(Hex)
00
01
02
03
04
05
Default value
(Hex)
CC
04
22
11
-
AA
Contents
idVendor
[1]
(lower byte)
idVendor
[1]
(upper byte)
idProduct
[2]
(lower byte)
idProduct
[2]
(upper byte)
configuration bits C7 to C0; see
Table 23
signature
相關PDF資料 |
PDF描述 |
|---|---|
| ISP1122BD | Universal Serial Bus stand-alone hub |
| ISP1122D | Universal Serial Bus stand-alone hub |
| ISP1122NB | Universal Serial Bus stand-alone hub |
| ISP1123BD | CAP .068UF 100V PPS FILM ECH-S |
| ISP1123 | Universal Serial Bus compound hub |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISP1122A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub |
| ISP1122ABD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub |
| ISP1122AD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub |
| ISP1122ANB | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub |
| ISP1122BD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub |
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