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參數(shù)資料
| 型號(hào)： | 20H04 |
| 廠商： | SMSC Corporation |
| 英文描述： | 4-PORT USB2.0 HUB CONTROLLER |
| 中文描述： | 4端口USB2.0集線器控制器 |
| 文件頁(yè)數(shù)： | 24/38頁(yè) |
| 文件大小： | 919K |
| 代理商： | 20H04 |
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4-Port USB2.0 Hub Controller
Datasheet
Revision 1.63 (10-14-04)
Page 24
SMSC USB20H04
DATASHEET
8.1.2
Internal Default Configuration
The internal default configuration is enabled when SMB_SEL_N is high and CS/EE_SEL is low on the
rising edge of RESET_N. If SELF_PWR is low, then the bus-powered default settings are loaded.
USB20H04
SCK/SCL
SD/SDA
VDD3.3
SMB_SEL_N
CS/EE_SEL
SELF_PWR
Bus/Self
Power Select
0=Bus-Power
1=Self-Power
1k
Figure 8.2 - Internal Default Mode
8.2
EEPROM Programming Values
Configuration data is loaded from an external EEPROM following reset. The values to be programmed into
the EEPROM are summarized in Table 8.1 - Summary of OEM Value Programming.
Table 8.1 - Summary of OEM Value Programming
ADDRESS
0
1
2
3
4
5
6
7
8
9
10
11
FIELD NAME
VID (MSB)
VID (LSB)
PID (MSB)
PID (LSB)
DID (MSB)
DID (LSB)
Config_Byte_3
Config_Byte_2
Config_Byte_1
Max_Power
HubContrCurrent
PwrOn2PwrGood
DESCRIPTION
Vendor ID (assigned by USB-IF).
Product ID (assigned by Manufacturer).
Device ID (assigned by Manufacturer).
Configuration options defined in Table 8.2.
Configuration options defined in Table 8.3.
Configuration options defined in Table 8.4.
Maximum current for this configuration, see Table 8.5.
Maximum current for the USB20H04, see Table 8.5.
Time until power is stable, see Table 8.5.
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