12. ONCETM Mode (ON Chip Emulation) The ONCE mo" />
參數(shù)資料
型號(hào): TS80C31X2-LCE
廠商: Atmel
文件頁(yè)數(shù): 16/42頁(yè)
文件大?。?/td> 0K
描述: IC MCU 8BIT 30/20MHZ 44-VQFP
標(biāo)準(zhǔn)包裝: 27
系列: 80C
核心處理器: 8051
芯體尺寸: 8-位
速度: 30/20MHz
連通性: UART/USART
外圍設(shè)備: POR
輸入/輸出數(shù): 32
程序存儲(chǔ)器類型: ROMless
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-QFP
包裝: 托盤
23
4428E–8051–02/08
AT/TS80C31X2
12. ONCETM Mode (ON Chip Emulation)
The ONCE mode facilitates testing and debugging of systems using TS80C31X2 without remov-
ing 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 cir-
cuit Table 26. shows the status of the port pins during ONCE mode.
Normal operation is restored when normal reset is applied.
Table 12-1.
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
TS87C54X2-MIE IC MCU 8BIT 16K OTP 40MHZ 44VQFP
TS80C51RA2-MCE IC MCU 8BIT 256BYTE 40MHZ 44VQFP
TS80C31X2-VIE IC MCU 8BIT 40/30MHZ 44-VQFP
TS87C51RC2-MCE IC MCU 8BIT 32K OTP 40MHZ 44VQFP
TS87C51RC2-LIE IC MCU 8BIT 32K OTP 40MHZ 44VQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS80C31X2-LCEB 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz
TS80C31X2-LCED 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless
TS80C31X2-LCER 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz
TS80C31X2-LIA 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-LIAB 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz