12. ONCETM Mode (ON Chip Emulation) The ONCE mo" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� TS80C31X2-LIE
寤犲晢锛� Atmel
鏂囦欢闋佹暩(sh霉)锛� 16/42闋�
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC MCU 8BIT 30/20MHZ 44-VQFP
妯欐簴鍖呰锛� 9
绯诲垪锛� 80C
鏍稿績铏曠悊鍣細 8051
鑺珨灏哄锛� 8-浣�
閫熷害锛� 30/20MHz
閫i€氭€э細 UART/USART
澶栧湇瑷倷锛� POR
杓稿叆/杓稿嚭鏁�(sh霉)锛� 32
绋嬪簭瀛樺劜鍣ㄩ鍨嬶細 ROMless
RAM 瀹归噺锛� 128 x 8
闆诲 - 闆绘簮 (Vcc/Vdd)锛� 2.7 V ~ 5.5 V
鎸暕鍣ㄥ瀷锛� 鍏�(n猫i)閮�
宸ヤ綔婧害锛� -40°C ~ 85°C
灏佽/澶栨锛� 44-QFP
鍖呰锛� 鎵樼洡
23
4428E鈥�8051鈥�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
鐩搁棞PDF璩囨枡
PDF鎻忚堪
TS87C54X2-MCE IC MCU 8BIT 16K OTP 40MHZ 44VQFP
PIC18F66K90-I/MR IC MCU 8BIT 64KB FLASH 64QFN
PIC24HJ32GP304-I/ML IC PIC MCU FLASH 32K 44-QFN
PIC18F67K22-I/PTRSL MCU PIC 128K FLASH XLP 64TQFP
PIC18F66K90-I/MRRSL MCU PIC 64K FLASH MEM XLP 64QFN
鐩搁棞浠g悊鍟�/鎶€琛撳弮鏁�(sh霉)
鍙冩暩(sh霉)鎻忚堪
TS80C31X2-LIEB 鍒堕€犲晢:TEMIC 鍒堕€犲晢鍏ㄧū:TEMIC Semiconductors 鍔熻兘鎻忚堪:8-bit CMOS Microcontroller 0-60 MHz
TS80C31X2-LIED 鍒堕€犲晢:TEMIC 鍒堕€犲晢鍏ㄧū:TEMIC Semiconductors 鍔熻兘鎻忚堪:8-bit CMOS Microcontroller 0-60 MHz
TS80C31X2-LIER 鍒堕€犲晢:TEMIC 鍒堕€犲晢鍏ㄧū:TEMIC Semiconductors 鍔熻兘鎻忚堪:8-bit CMOS Microcontroller 0-60 MHz
TS80C31X2-LLAB 鍒堕€犲晢:ATMEL 鍒堕€犲晢鍏ㄧū:ATMEL Corporation 鍔熻兘鎻忚堪:8-bit CMOS Microcontroller ROMless
TS80C31X2-LLAD 鍒堕€犲晢:ATMEL 鍒堕€犲晢鍏ㄧū:ATMEL Corporation 鍔熻兘鎻忚堪:8-bit CMOS Microcontroller ROMless