參數(shù)資料
型號(hào)： TS83C51RB2
廠商： Atmel Corp.
英文描述： High Performance 8-bit Microcontrollers
中文描述： 高性能8位微控制器
文件頁(yè)數(shù)： 48/74頁(yè)
文件大小： 903K
代理商： TS83C51RB2
48
Rev. C - 06 March, 2001
TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
6.11. ONCE
TM
Mode (ON Chip Emulation)
The ONCE mode facilitates testing and debugging of systems using TS80C51Rx2 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 circuit Table 26.
shows the status of the port pins during ONCE mode.
Normal operation is restored when normal reset is applied.
Table 25. 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
TS80C51RA2 GT 47C 7#12 40#16 PIN PLUG
TS80C51RA2-LCAB High Performance 8-bit Microcontrollers
TS80C51RA2-LCAD High Performance 8-bit Microcontrollers
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS83C51RB-20 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
TS83C51RB-24 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
TS83C51RB2-LCA 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller
TS83C51RB2-LCB 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller
TS83C51RB2-LCBR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
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