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參數(shù)資料
| 型號： | DS89C450 |
| 英文描述： | Ultra-High-Speed Flash Microcontrollers |
| 中文描述： | 超高速閃存微控制器 |
| 文件頁數(shù)： | 36/48頁 |
| 文件大小： | 934K |
| 代理商： | DS89C450 |
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DS89C430/DS89C440/DS89C450 Ultra-High-Speed Flash Microcontrollers
36 of 48
Figure 13. Page Mode 1, External Data Memory Access
(PAGES = 01, Stretch = 4, CD = 10)
ALE
PSEN
Port 0
Port 2
ALE
PSEN
Port 0
Port 2
RD
/
WR
XTAL1
Inst
Inst
Inst
Inst
Inst
MSB
LSB
LSB
LSB
LSB
LSB
LSB LSB
Inst
Data
Memory Access (Stretch = 4)
MOVX Instruction (Page miss)
3rd
Cycle
Cycle
1st
Cycle
2nd
Cycle
4th
9th
Cycle
MOVX
Instruction
Fetch
LSB
LSB LSB
Inst
Inst
Inst
MOVX Instruction (Page hit)
Memory Access (Stretch = 4)
MOVX
Instruction
Fetch
1st
Cycle
2nd
Cycle
3rd
Cycle
4th
Cycle
5th
Cycle
9th
Cycle
LSB
LSB
LSB
LSB
Inst
Inst
Inst
Inst
RD
/
WR
Data
LSB
Interrupts
The DS89C430 provides 13 interrupt sources. All interrupts, with the exception of the power fail, are controlled by a
series combination of individual enable bits and a global enable (EA) in the interrupt-enable register (IE.7). Setting
EA to a logic 1 allows individual interrupts to be enabled. Setting EA to a logic 0 disables all interrupts regardless of
the individual interrupt-enable settings. The power-fail interrupt is controlled by its individual enable only.
The interrupt enables and priorities are functionally identical to those of the 80C52, except that the DS89C430
supports five levels of interrupt priorities instead of the original two.
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相關(guān)代理商/技術(shù)參數(shù) |
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| DS89C450+ENG | 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC 64KB FLASH 5V 44TQFP - Trays |
| DS89C450+ENL | 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC 64KB FLASH 5V 44TQFP - Trays |
| DS89C450+MNG | 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC 64KB FLASH 5V 40PDIP - Rail/Tube |
| DS89C450+MNL | 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC 64KB FLASH 5V 40PDIP - Rail/Tube |
| DS89C450+QNL | 制造商:Maxim Integrated Products 功能描述:MICRO HI SPD 44PLCC 64K IND PB-FREE - Rail/Tube |
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