參數(shù)資料
型號: DS80C320-ECL
廠商: Maxim Integrated Products
文件頁數(shù): 3/38頁
文件大小: 0K
描述: IC MCU HI SPEED 33MHZ 44-TQFP
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
產(chǎn)品變化通告: Product Discontinuation 20/Feb/2012
標準包裝: 160
系列: 80C
核心處理器: 8051
芯體尺寸: 8-位
速度: 33MHz
連通性: EBI/EMI,SIO,UART/USART
外圍設備: 電源故障復位,WDT
輸入/輸出數(shù): 32
程序存儲器類型: ROMless
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-TQFP
包裝: 托盤
DS80C320/DS80C323 High-Speed/Low-Power Microcontrollers
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Table 1 shows the speed for each class of instruction. Note that many of the instructions have multiple op
codes. There are 255 op codes for 111 instructions. Of the 255 op codes, 159 are three times faster than
the original 80C32. While a system that emphasizes those instructions will see the most improvement, the
large total number that receive a 3 to 1 improvement assure a dramatic speed increase for any system. The
speed improvement summary is provided below.
SPEED ADVANTAGE SUMMARY
#OP CODES
SPEED
IMPROVEMENT
159
3.0 x
51
1.5 x
43
2.0 x
2
2.4 x
255
Average: 2.5
MEMORY ACCESS
The DS80C320/DS80C323 do not contain on-chip ROM and 256 bytes of scratchpad RAM. Off-chip
memory is accessed using the multiplexed address/data bus on P0 and the MSB address on P2. Figure 3
shows a typical memory connection. Timing diagrams are provided in the Electrical Specifications
section. Program memory (ROM) is accessed at a fixed rate determined by the crystal frequency and the
actual instructions. As previously mentioned, an instruction cycle requires 4 clocks. Data memory (RAM)
is accessed according to a variable-speed MOVX instruction as described below.
Figure 3. Typical Memory Connection
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