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參數(shù)資料
型號: W77E516
廠商: WINBOND ELECTRONICS CORP
元件分類: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 48/85頁
文件大小: 596K
代理商: W77E516
Preliminary W77E516
- 48 -
Wait State Control Signal
Either with the software using stretch value to change the required machine cycle of MOVX instruction,
the W77E516 provides another hardware signal WAIT to implement the wider duration of external
data access timing. This wait state control signal is the alternate function of P4.0 such that it can only
be invoked to 44-pin PLCC/QFP package type. The wait state control signal can be enabled by setting
WS (ROMMAP.7) bit. When enabled, the setting of stretch value decides the minimum length of
MOVX instruction cycle and the device will sample the WAIT pin at each C3 state before the rising
edge of read/write strobe signal during MOVX instruction. Once this signal being recongnized, one
more machine cycle (wait state cycle) will be inserted into next cycle. The inserted wait state cycles are
unlimited, so the MOVX instruction cycle will end in which the wait state control signal is deactivated.
Using wait state control signal allows a dynamically access timimg to a selected external peripheral.
The WS bit is accessed by the Timed Access (TA register) Protection procedure.
Wait State Control Signal Timing (when Stretch = 1)
C2 C3
C4
C1
CLOCK
ALE
PSEN
ADDRESS
RD / WR
C2 C3
C4
C1
C2 C3
C4
C1
C2 C3
C4
C1
C2 C3
C4
C1
MOVX Instruction
MCycle
SCycle
WCycle
Third
WAIT
sample
WAIT
sample WAIT
Extended duration
original rising edge
Wait State Control Signal Timing (when Stretch = 2)
C2 C3
C4
C1
CLOCK
ALE
PSEN
ADDRESS
RD / WR
C2 C3
C4
C1
C2 C3
C4
C1
C2 C3
C4
C1
C3
C4
C2
C1
MOVX Instruction
MCycle
SCycle
Wait-State
Cycle
Third
WAIT
sample
WAIT
sample WAIT
Extended duration
original rising edge
C2
C1
Fourth
Cycle
相關(guān)PDF資料
PDF描述
W77E516-25 8-BIT MICROCONTROLLER
W77E516-40 8-BIT MICROCONTROLLER
W77E516F-25 8-BIT MICROCONTROLLER
W77E516F-40 8-BIT MICROCONTROLLER
W77E516P-25 8-BIT MICROCONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W77E516-25 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W77E516-40 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W77E516A 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W77E516A40DL 功能描述:IC MCU 8-BIT 64K FLASH 40-DIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:W77 標(biāo)準(zhǔn)包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI,I²C,UART/USART 外圍設(shè)備:POR,PWM,WDT 輸入/輸出數(shù):40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC(J 形引線) 包裝:帶卷 (TR)
W77E516A40FL 功能描述:IC MCU 8-BIT 64K FLASH 44-QFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:W77 標(biāo)準(zhǔn)包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI,I²C,UART/USART 外圍設(shè)備:POR,PWM,WDT 輸入/輸出數(shù):40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC(J 形引線) 包裝:帶卷 (TR)