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參數資料
| 型號： | W81C180 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 總線控制器 |
| 英文描述： | USB HUB Controller Interface(USB結構的集線器控制器接口) |
| 中文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PDIP32 |
| 封裝： | PLASTIC, DIP-32 |
| 文件頁數： | 8/11頁 |
| 文件大小： | 83K |
| 代理商： | W81C180 |
W81C180
Publication Release Date:May 1997
- 8 -
Revision A1
PORT STATUS:
If any downstream port changes state (attached/detached) for >2.5us, then the port flag is set and the
interrupt enabled. The uC will then have to inform the host that a change has occurred via endpoint 1.
LOW SPEED DETECTION:
The W81C180 detects if a port is high speed (HS) or low speed (LS) and sets the appropriate flag.
When the port is configured, the uC has to configure it as a HS or LS port and inform the host when
asked. The W81C180 will only transmit data from the host to a LS port if the data is preceded by the
LS PID and the port is enabled.
LOW SPEED KEEP ALIVE:
Before every SOF, the W81C180 will transmit two LS single ended zeros (SEO's) to all enabled LS
ports, unless the hub is in the suspend mode.
USB PHASE LOCK LOOP (PLL):
The W81C180's PLL is synchronized to the J-K state from port0 and assures that the data from the
host is stored into memory accurately.
ABSOLUTE MAXIMUM RATINGS:
PARAMETER
LIMIT
Supply Voltage (Vcc to Vss)
5.5V
Analog Input Voltage
Vss-0.5V to Vcc+0.5V
Digital Input Voltage
Vss-0.5V to Vcc+0.5V
Power Dissipation
TBD
Ambient Operating Temperature
0
o
C to 70
o
C
Lead Temperature (Soldering, 10 sec)
250
o
C
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