- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄363895 > W77E516P-25 (WINBOND ELECTRONICS CORP) 8-BIT MICROCONTROLLER PDF資料下載
參數(shù)資料
| 型號(hào)： | W77E516P-25 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 50/85頁 |
| 文件大?。?/td> | 596K |
| 代理商： | W77E516P-25 |
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頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁當(dāng)前第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁
Preliminary W77E516
- 50 -
The selection of instruction rate is going to take effect after a delay of one instruction cycle.
Switching to divide by 64 or 1024 mode must first go from divide by 4 mode. This means software
can not switch directly between clock/64 and clock/1024 mode. The CPU has to return clock/4
mode first, then go to clock/64 or clock/1024 mode.
The W77E516 allows the user to use internal RC oscillator instead of external crystal. Setting the
XT/RG bit (EXIF.3) selects the crystal or RC oscillator as the clock source. When invoking RC
oscillator in Economy mode, software may set the XTOFF bit to turn off the crystal amplifier for
saving power. The CPU would run at the clock rate of approximately 2
4 MHz divided by 4, 64 or
1024. The RC oscillator is not precise so that can not be invoked to the operation which needs the
accurate time-base such as serial communication. The RGMD(EXIF.2) indicates current clock
source. When switching the clock source, CPU needs one instruction cycle delay to take effect new
setting. If crystal amplifier is disabled and RC oscillator is present clock source, software must first
clear the XTOFF bit to turn on crystal amplifier before switch to crystal operation. Hardware will set
the XTUP bit (STATUS.4) once the crystal is warm-up and ready for use. It is unable to set XT/RG
bit to 1 if XTUP = 0.
In Economy mode, the serial port can not receive/transmit data correctly because the baud rate is
changed. In some systems, the external interrupts may require the fastest process such that the
reducing of operating speed is restricted. In order to solve these dilemmas, the W77E516 offers a
switchback feature which allows the CPU back to clock/4 mode immediately when triggered by
serial operation or external interrupts. The switchback feature is enabled by setting the SWB bit
(PMR.5). A serial port reception/transmission or qualified external interrupt which is enabled and
acknowledged without block conditions will cause CPU to return to divide by 4 mode. For the serial
port reception, a switchback is generated by a falling edge associated with start bit if the serial port
reception is enabled. When a serial port transmission, an instruction which writes a byte of data to
serial port buffer will cause a switchback to ensure the correct transmission. The switchback feature
is unaffected by serial port interrupt flags. After a switchback is generated, the software can
manually return the CPU to Economy mode. Note that the modification of clock control bits CD0
and CD1 will be ignored during serial port transmit/receive when switchback is enabled. The
Watchdog timer reset, power-on/fail reset or external reset will force the CPU to return to divide by
4 mode.
Power Down Mode
The device can be put into Power Down mode by writing 1 to bit PCON.1. The instruction that does
this will be the last instruction to be executed before the device goes into Power Down mode. In the
Power Down mode, all the clocks are stopped and the device comes to a halt. All activity is
completely stopped and the power consumption is reduced to the lowest possible value. In this
state the ALE and PSEN pins are pulled low. The port pins output the values held by their
respective SFRs.
The W77E516 will exit the Power Down mode with a reset or by an external interrupt pin enabled as
level detect. An external reset can be used to exit the Power down state. The high on RST pin
terminates the Power Down mode, and restarts the clock. The program execution will restart from
0000h. In the Power down mode, the clock is stopped, so the Watchdog timer cannot be used to
provide the reset to exit Power down mode.
The W77E516 can be woken from the Power Down mode by forcing an external interrupt pin
activated, provided the corresponding interrupt is enabled, while the global enable(EA) bit is set and
the external input has been set to a level detect mode. If these conditions are met, then the low
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W77E516P-40 | 8-BIT MICROCONTROLLER |
| W77E532 | 8 BIT MICROCONTROLLER |
| W77E58 | 8 BIT MICROCONTROLLER |
| W77E58-25 | 8 BIT MICROCONTROLLER |
| W77E58-40 | 8 BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W77E516P-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77E532 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E532_07 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77E532A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77E532A40DL | 功能描述:IC MCU 8-BIT 128KB FLASH 40-DIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:W77 產(chǎn)品培訓(xùn)模塊:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 標(biāo)準(zhǔn)包裝:1 系列:M16C™ M32C/80/87 核心處理器:M32C/80 芯體尺寸:16/32-位 速度:32MHz 連通性:EBI/EMI，I²C，IEBus，IrDA，SIO，UART/USART 外圍設(shè)備:DMA，POR，PWM，WDT 輸入/輸出數(shù):121 程序存儲(chǔ)器容量:384KB（384K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:24K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 34x10b，D/A 2x8b 振蕩器型:內(nèi)部 工作溫度:-20°C ~ 85°C 封裝/外殼:144-LQFP 包裝:托盤 產(chǎn)品目錄頁面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。