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參數(shù)資料
| 型號： | DS80C320 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Speed/Low-Power Microcontrollers |
| 中文描述： | 高速/低功耗微控制器 |
| 文件頁數(shù)： | 10/42頁 |
| 文件大?。?/td> | 1501K |
| 代理商： | DS80C320 |
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DS80C320/DS80C323
10 of 42
SPEED ADVANTAGE SUMMARY
#Opcodes
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 contains no 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. A typical
memory connection is shown in Figure 3. Timing diagrams are provided in the Electrical Specifications.
Program memory (ROM) is accessed at a fixed rate determined by the crystal frequency and the actual
instructions. As mentioned above, an instruction cycle requires 4 clocks. Data memory (RAM) is
accessed according to a variable speed MOVX instruction as described below.
TYPICAL MEMORY CONNECTION
Figure 3
STRETCH MEMORY CYCLE
The DS80C320/DS80C323 allows the application software to adjust the speed of data memory access.
The microcontroller is capable of performing the MOVX in as little as two instruction cycles. However,
this value can be stretched as needed so that both fast memory and slow memory or peripherals can be
accessed with no glue logic. Even in high-speed systems, it may not be necessary or desirable to perform
data memory access at full speed. In addition, there are a variety of memory mapped peripherals such as
LCD displays or UARTs that are not fast.
The Stretch MOVX is controlled by the Clock Control Register at SFR location 8Eh as described below.
This allows the user to select a stretch value between 0 and 7. A Stretch of 0 will result in a two-machine
cycle MOVX. A Stretch of 7 will result in a MOVX of nine machine cycles. Software can dynamically
change this value depending on the particular memory or peripheral.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS80C320-ECG | Strain Relief |
| DS80C320-ECL | High-Speed/Low-Power Microcontrollers |
| DS80C320-ENG | High-Speed/Low-Power Microcontrollers |
| DS80C320-ENL | High-Speed/Low-Power Microcontrollers |
| DS80C320-MCG | High-Speed/Low-Power Microcontrollers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS80C320_06 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:High-Speed/Low-Power Microcontrollers |
| DS80C320+ENL | 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC ROMLESS 5V 44TQFP - Trays |
| DS80C320+FCG | 制造商:Maxim Integrated Products 功能描述:MICRO HI SPD 44PQFP 25MHZ PB-FREE - Trays |
| DS80C320+FNG | 制造商:Maxim Integrated Products 功能描述:MICRO HS 44MQFP 25MHZ IND PB-FREE - Trays |
| DS80C320+MCG | 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC ROMLESS 5V 40PDIP - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC 8BIT CPU CMOS 80C320 DIP40 制造商:Maxim Integrated Products 功能描述:IC, 8BIT CPU CMOS, 80C320, DIP40 制造商:Maxim Integrated Products 功能描述:IC, 8BIT CPU CMOS, 80C320, DIP40; Controller Family/Series:(8051) 8052; Core Size:8bit; No. of I/O's:32; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; Digital IC Case Style:DIP; No. of Pins:40; RAM Memory Size:256Byte; CPU ;RoHS Compliant: Yes |
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