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參數資料
| 型號： | ISP1123 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Universal Serial Bus compound hub |
| 中文描述： | 通用串行總線復合樞紐 |
| 文件頁數： | 22/49頁 |
| 文件大小： | 1155K |
| 代理商： | ISP1123 |
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Philips Semiconductors
ISP1123
USB compound hub
Preliminary specification
Rev. 01 — 5 October 1999
22 of 49
9397 750 06325
Philips Electronics N.V. 1999. All rights reserved.
The slave address which ISP1123 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).
11.3 Data transfer
When the ISP1123 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
.
[1]
[2]
[3]
Default value at reset if no external EEPROM is present.
Modifies the Hub Descriptor field ‘bPwrOn2PwrGood’, see
Table 14
.
Modifies the Hub Descriptor field ‘MaxPower’, see
Table 14
.
Table 22: EEPROM organization
Address
(Hex)
00
01
02
03
04
05
Default value
(Hex)
CC
04
23
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
Table 23: Configuration bits
Bit
Function
Value
(Bin)
see
Table 4 “Mode selection”
see
Table 4 “Mode selection”
0
[1]
must always be programmed to logic 0
0
[1]
100 ms (bPwrOn2PwrGood = 32H)
1
500 ms (bPwrOn2PwrGood = FAH)
0
[1]
string descriptors disabled
1
string descriptors enabled (strings:
“Philips Semiconductors”, “ISP1122”)
0
internal analog overcurrent detection
circuit disabled; overcurrent pins OCn
function as digital inputs (TTL level)
1
[1]
internal analog overcurrent detection
circuit enabled
00
[1]
100 mA (MaxPower = 32H)
01
500 mA (MaxPower = FAH)
1X
0 mA (MaxPower = 00H)
Description
C0
C1
C2
C3
OPTION
INDV
reserved
PwrOn2PwrGood
[2]
C4
string descriptor enable
C5
internal analog overcurrent
detection enable
C7, C6
MaxPower
[3]
相關PDF資料 |
PDF描述 |
|---|---|
| ISP1123D | Universal Serial Bus compound hub |
| 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISP1123BD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub |
| ISP1123D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub |
| 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 |
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