12. ONCETM Mode (ON Chip Emulation) The ONCE mo" />
參數(shù)資料
型號: TS80C31X2-MIE
廠商: Atmel
文件頁數(shù): 16/42頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 40/20MHZ 44-VQFP
標(biāo)準(zhǔn)包裝: 9
系列: 80C
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
輸入/輸出數(shù): 32
程序存儲器類型: ROMless
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°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
TS80C31X2-VCE IC MCU 8BIT 40/30MHZ 44-VQFP
TS87C54X2-MIC IC MCU 8BIT 16K OTP 40MHZ 44PQFP
TS80C31X2-LIC IC MCU 8BIT 30/20MHZ 44-PQFP
208209-2 CONN RECEPT 19 POS METRIMATE
TS87C54X2-VCC IC MCU 8BIT 16K OTP 40MHZ 44PQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS80C31X2-MIEB 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz
TS80C31X2-MIED 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz
TS80C31X2-MIER 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:8-bit CMOS Microcontroller 0-60 MHz
TS80C31X2-MLAB 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless
TS80C31X2-MLAD 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless