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參數(shù)資料
型號(hào)： W77E058A
廠(chǎng)商： WINBOND ELECTRONICS CORP
元件分類(lèi)： 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(yè)數(shù)： 36/87頁(yè)
文件大?。?/td> 594K
代理商： W77E058A
W77E058A
- 36 -
8.1
Instruction Timing
The instruction timing for the W77E058 is an important aspect, especially for those users who wish to
use software instructions to generate timing delays. Also, it provides the user with an insight into the
timing differences between the W77E058 and the standard 8032. In the W77E058 each machine
cycle is four clock periods long. Each clock period is designated a state. Thus each machine cycle is
made up of four states, C1, C2 C3 and C4, in that order. Due to the reduced time for each instruction
execution, both the clock edges are used for internal timing. Hence it is important that the duty cycle
of the clock be as close to 50% as possible to avoid timing conflicts. As mentioned earlier, the
W77E058 does one op-code fetch per machine cycle. Therefore, in most of the instructions, the
number of machine cycles needed to execute the instruction is equal to the number of bytes in the
instruction. Of the 256 available op-codes, 128 of them are single cycle instructions. Thus more than
half of all op-codes in the W77E058 are executed in just four clock periods. Most of the two-cycle
instructions are those that have two byte instruction codes. However there are some instructions that
have only one byte instructions, yet they are two cycle instructions. One instruction which is of
importance is the MOVX instruction. In the standard 8032, the MOVX instruction is always two
machine cycles long. However in the W77E058, the user has a facility to stretch the duration of this
instruction from 2 machine cycles to 9 machine cycles. The
RD
and
WR
strobe lines are also
proportionately elongated. This gives the user flexibility in accessing both fast and slow peripherals
without the use of external circuitry and with minimum software overhead. The rest of the instructions
are either three, four or five machine cycle instructions. Note that in the W77E058, based on the
number of machine cycles, there are five different types, while in the standard 8032 there are only
three. However, in the W77E058 each machine cycle is made of only 4 clock periods compared to the
12 clock periods for the standard 8032. Therefore, even though the number of categories has
increased, each instruction is at least 1.5 to 3 times faster than the standard 8032 in terms of clock
periods.
Single Cycle
C4
C3
C2
C1
CLK
ALE
PSEN
AD7-0
PORT 2
A7-0
Address A15-8
Data_ in D7-0
Figure 3. Single Cycle Instruction Timing
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W77E058A40DL 功能描述:IC MCU 8-BIT 32K FLASH 40-DIP RoHS:是 類(lèi)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(chǔ)器容量:- 程序存儲(chǔ)器類(lèi)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(xiàn)） 包裝:帶卷 (TR)
W77E058A40FL 功能描述:IC MCU 8-BIT 32K FLASH 44-PQFP RoHS:是 類(lèi)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(chǔ)器容量:- 程序存儲(chǔ)器類(lèi)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(xiàn)） 包裝:帶卷 (TR)
W77E058A40PL 功能描述:IC MCU 8-BIT 32K FLASH 44-PLCC RoHS:是 類(lèi)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:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:40KB（20K x 16） 程序存儲(chǔ)器類(lèi)型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤(pán) 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
W77E11 制造商:OMRON INDUSTRIAL AUTOMATION 功能描述:EXECUTION EX. NO.1 DX CODE ZA
W77E468 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8 BIT MICROCONTROLLER
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