參數(shù)資料
型號: W78E858
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, PDIP40
封裝: DIP-40
文件頁數(shù): 5/33頁
文件大小: 1186K
代理商: W78E858
W78E858
Publication Release Date: May 5, 2004
- 5 -
Revision A4
4. PIN DESCRIPTION
SYMBOL
TYPE
DESCRIPTIONS
EA
I
External Access Enable:
EA
low forces the processor to execute the
external ROM. The ROM address and data will not be present on the bus if
the
EA
pin is high and the program counter is within the 32 KB area.
Otherwise they will be present on the bus.
PSEN
O/H
Program Strobe Enable:
PSEN
enables the external ROM data in the Port 0
address/data bus. When internal ROM access is performed, no
PSEN
strobe
signal outputs originate from this pin.
ALE
O/H
Address Latch Enable:
ALE
is used to enable the address latch that
separates the address from the data on Port 0. ALE runs at 1/6th of the
oscillator frequency. An ALE pulse is omitted during external data memory
accesses.
RST
I/L
RESET:
A high on this pin for two machine cycles while the oscillator is
running resets the device. RST has a Schmitt trigger input stage to provide
additional noise immunity with a slow rising input voltage.
XTAL1
I
Crystal 1:
This is the crystal oscillator input. This pin may be driven by an
external clock
XTAL2
O
Crystal 2:
This is the crystal oscillator output. It is the inversion of XTAL1.
V
SS
I
Ground:
Ground potential.
V
DD
I
Power Supply:
Supply voltage for operation.
P0.0
P0.7
I/O D
Port 0:
Function is the same as that of the standard 8052.
P1.0
P1.7
I/O H
Port 1:
Function is the same as that of the standard 8052. Port1 also service
the alternative function INT2
INT9. P1.0 provide a timer2 programmable
clock output. Four channel PWM clock output via P1.4
P1.7
P2.0
P2.7
I/O H
Port 2:
Port 2 is a bi-directional I/O port with internal pull-ups and emits the
high-order address byte during accesses external memory
P3.0
P3.7
I/O H
Port 3:
Function is the same as that of the standard 8052
P4.0
P4.3
I/O H
Port 4:
Function is the same as Port1
*
Note:
TYPE I: input, O: output, I/O: bi-directional, H: pull-high, L: pull-low, D: open drain
相關(guān)PDF資料
PDF描述
W78ERD2_07 8-BIT MICROCONTROLLER
W78ERD2A 8-BIT MICROCONTROLLER
W78ERD2A40DL 8-BIT MICROCONTROLLER
W78ERD2A40FL 8-BIT MICROCONTROLLER
W78ERD2A40PL 8-BIT MICROCONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W78E858_06 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W78E858A40DL 功能描述:IC MCU 8-BIT 32K FLASH 40-DIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:W78 標準包裝: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)
W78E858A40FL 功能描述:IC MCU 8-BIT 32K FLASH 44-PQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:W78 標準包裝: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)
W78E858A40PL 功能描述:IC MCU 8-BIT 32K FLASH 44-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:W78 標準包裝: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)
W78ERD2 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER