參數(shù)資料
型號(hào): TS87C51RB2-VCE
廠商: International Rectifier
英文描述: High Performance 8-bit Microcontroller
中文描述: 高性能8位微控制器
文件頁數(shù): 48/85頁
文件大?。?/td> 762K
代理商: TS87C51RB2-VCE
48
4188E–8051–08/06
AT/TS8xC51Rx2
6.9
ONCE
TM
Mode (ON Chip Emulation)
The ONCE mode facilitates testing and debugging of systems using TS8xC51Rx2 without
removing the circuit from the board. The ONCE mode is invoked by driving certain pins of the
TS80C51Rx2; the following sequence must be exercised:
Pull ALE low while the device is in reset (RST high) and PSEN is high.
Hold ALE low as RST is deactivated.
While the TS80C51Rx2 is in ONCE mode, an emulator or test CPU can be used to drive the cir-
cuit Table 26. shows the status of the port pins during ONCE mode.
Normal operation is restored when normal reset is applied.
Table 6-23.
External Pin Status during ONCE Mode
ALE
PSEN
Port 0
Port 1
Port 2
Port 3
XTAL1/2
Weak pull-up
Weak pull-up
Float
Weak pull-up
Weak pull-up
Weak pull-up
Active
相關(guān)PDF資料
PDF描述
TS87C51RB2-VIB High Performance 8-bit Microcontroller
TS87C51RB2-VIE High Performance 8-bit Microcontroller
TS87C51RC2-LCE High Performance 8-bit Microcontroller
TS87C51RC2-LIB High Performance 8-bit Microcontroller
TS87C51RC2-LIE High Performance 8-bit Microcontroller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS87C51RB2-VCEB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
TS87C51RB2-VCED 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
TS87C51RB2-VCER 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
TS87C51RB2-VIA 功能描述:IC MCU 8BIT 16K OTP 40MHZ 40-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:87C 標(biāo)準(zhǔn)包裝:9 系列:87C 核心處理器:8051 芯體尺寸:8-位 速度:40/20MHz 連通性:UART/USART 外圍設(shè)備:POR,WDT 輸入/輸出數(shù):32 程序存儲(chǔ)器容量:32KB(32K x 8) 程序存儲(chǔ)器類型:OTP 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:- 振蕩器型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:40-DIP(0.600",15.24mm) 包裝:管件
TS87C51RB2-VIAD 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller