- 您現在的位置：買賣IC網 > PDF目錄363901 > W81C280 (WINBOND ELECTRONICS CORP) USB Keyboard/ Device Controller(具有通用串行總線接口的鍵盤／設備控制器) PDF資料下載
參數資料
| 型號： | W81C280 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | USB Keyboard/ Device Controller(具有通用串行總線接口的鍵盤／設備控制器) |
| 中文描述： | 8-BIT, MROM, MICROCONTROLLER, PDIP40 |
| 封裝： | DIP-40 |
| 文件頁數： | 20/27頁 |
| 文件大小： | 328K |
| 代理商： | W81C280 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁當前第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁
W81C280
Publication Release Date: July 1997
- 16 -
Revision 0.50
6.5 Internal interrupts
The interrupt (P3.7 in CPU core ) will be enabled and disabled under the following actions:
ENABLE INTERRUPT
DISABLE INTERRUPT
Resume
Endpoint 1 - 4 Handshake ACK received
After Status Registers are read.
Endpoint 0 data received
After the CPU core reads the Status Registers.
Turnaround time-out
After the CPU core reads the Status Registers.
Suspend (no activity) on the USB bus
After the CPU core reads the Status Registers.
Reset sent from upstream
After the CPU core reads the Status Registers.
6.5.1 Reacting To The Internal interrupts
Since there is no condition which requires immediate attention by the CPU core, the NINT pin does
not necessarily have to be used. The CPU core can access the W81C280 in following alternative
way:
Have the P3.7 to be an interrupt pin in the CPU core and read the W81C280 Status registers when
it is enabled.
6.6 Reset
The W81C280 supports three types of reset. During a reset, all registers of the CPU core and USB
return to their default status, and USB device address is set to zero.
6.6.1 External Reset
As in 8051 series controller, the external RESET signal is sampled at S5P2. To take effect, it must be
held high at least two machine cycles while the oscillator is running.
An internal trigger circuit in the reset line is used to deglitch the reset line. The reset logic also has a
special glitch remocal circuit that ignores glitches on the reset line.
During reset, the ports are initialized to FFH, the stack pointer to 07H, PCON(with exception of bit 4)
to 00H, and all of the other SFR registers except SBUF to 00H. SBUF is not reset.
相關PDF資料 |
PDF描述 |
|---|---|
| W81E381 | FULL SPEED USB INTEGRATED MICROCONTROLLER |
| W81E381AD | FULL SPEED USB INTEGRATED MICROCONTROLLER |
| W81E381D | FULL SPEED USB INTEGRATED MICROCONTROLLER |
| W82C610 | Monitor Software OSD(On Screen Display) IC(監控軟件屏幕顯示控制器) |
| W82MV-NSBC | 2Mx32 SRAM 3.3V MULTI-CHIP PACKAGE |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W81E381 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:FULL SPEED USB INTEGRATED MICROCONTROLLER |
| W81E381AD | 制造商:WINBOND 制造商全稱:Winbond 功能描述:FULL SPEED USB INTEGRATED MICROCONTROLLER |
| W81E381D | 制造商:WINBOND 制造商全稱:Winbond 功能描述:FULL SPEED USB INTEGRATED MICROCONTROLLER |
| W-82 | 制造商:Hozan Tool Industrial Co Ltd 功能描述: 制造商:Curtis Industries 功能描述:DIN RAIL SLOTTED |
| W820 | 制造商:LUMINIS 制造商全稱:LUMINIS 功能描述:Post top mount |
發布緊急采購，3分鐘左右您將得到回復。