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參數(shù)資料
| 型號： | TH6503 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | USB Low-Speed Interface |
| 中文描述： | USB低速接口 |
| 文件頁數(shù)： | 9/24頁 |
| 文件大?。?/td> | 342K |
| 代理商： | TH6503 |
9
TH6503 USB Low-Speed Interface
Application
Wiring Diagram
Figure 14 shows a sample Application circuitry with the TH6503 and a MC68HC05.
To stabilize the internal power supply the V3.3 pin must always be connected with an 10μ capaci-
tor.
Figure 14. Sample Wiring diagram to connect the TH6503 with an MC68HC05
WAKE Function
The USB specification defines that a device has to
go into suspend mode if no bus traffic was de-
tected for ca. 3 ms. After the device is set to
suspend mode, the WAKE pin can be used to
Wake up the device with an external event.
If the WAKE pin is connected with an RC-Element,
the TH6503 wakes up after the time defined by the
RC-Element. This feature can be used to check for
data in periodical time frames.
RESET Output
The reset output (/ORST) of the TH6503 can be
connected with the reset input of the
microcontroller. It’s a low active signal.
This signal has a minimum length of 31 clock
cycles with a default frequency of 1.5 MHz (see Pin
Description for details).
After this reset pulse the microcontroller can
reseted but it must wait to programming the
TH6503 until the USB reset is inactive.
All register of TH6503 will be held in reset state,
exept the StatusRegister, until the corresponding
bits HWR or RES is cleared.
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