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參數(shù)資料

型號(hào)：	TS80C31X2-ELEB
廠商：	Atmel Corp.
英文描述：	8-bit CMOS Microcontroller ROMless
中文描述：	8位CMOS微控制器無ROM
文件頁數(shù)：	24/40頁
文件大小：	484K
代理商：	TS80C31X2-ELEB

Rev. A - Mar. 19, 1999

Preliminary

TS80C31X2

6.7 ONCE Mode (ON Chip Emulation)

The ONCE mode facilitates testing and debugging of systems using TS80C31X2 without removing the circuit from

the board. The ONCE mode is invoked by driving certain pins of the TS80C31X2; 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 TS80C31X2 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 12. External Pin Status during ONCE Mode

ALE

PSEN

Port 0

Port 1

Port 2

Port 3

XTAL1/2

Weak pull-up

Float

Weak pull-up

Active

相關(guān)PDF資料	PDF描述
TS80C31X2-ELED	8-bit CMOS Microcontroller ROMless
TS80C31X2-ELER	8-bit CMOS Microcontroller ROMless
TS80C31X2-LCAB	8-bit CMOS Microcontroller ROMless
TS80C31X2-LCAD	8-bit CMOS Microcontroller ROMless
TS80C31X2-LCAR	8-bit CMOS Microcontroller ROMless

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
TS80C31X2-ELED	制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless
TS80C31X2-ELER	制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless
TS80C31X2-LCA	功能描述:IC MCU 8BIT 30/20MHZ 40-DIP RoHS:否類別:集成電路 (IC) >> 嵌入式 - 微控制器，系列:80C 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
TS80C31X2-LCAB	制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless
TS80C31X2-LCAD	制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless

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