参数资料
型号: DS89C430-ENL
厂商: Maxim Integrated Products
文件页数: 29/46页
文件大小: 0K
描述: IC MCU FLASH 16KB 33MHZ 44-TQFP
产品培训模块: Lead (SnPb) Finish for COTS
产品变化通告: Product Discontinuation 20/Feb/2012
标准包装: 160
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 33MHz
连通性: EBI/EMI,SIO,UART/USART
外围设备: 电源故障复位,WDT
输入/输出数: 32
程序存储器容量: 16KB(16K x 8)
程序存储器类型: 闪存
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-TQFP
包装: 托盘
DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
35 of 46
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
MSB
LSB LSB
LSB
LSB LSB
Inst
Data
Memory Access (Stretch = 4)
MOVX Instruction (Page miss)
1st
Cycle
2nd
Cycle
3rd
Cycle
4th
Cycle
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
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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