參數(shù)資料
型號： AT83C51RC2-SLSUM
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： AT83C51RC2-SLSUM
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
AT83C51RD2 High Performance 8-bit Microcontroller
AT83C51RD2-3CSUL High Performance 8-bit Microcontroller
AT83C51RD2-3CSUM High Performance 8-bit Microcontroller
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT83C51RC2XM 制造商:Atmel Corporation 功能描述:
AT83C51RC2XXX-3CSCM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller
AT83C51RC2XXX-3CSIM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller
AT83C51RC2XXX-RLTIL 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller
AT83C51RC2XXX-RLTIM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller
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