參數(shù)資料
型號： DS89C450-ENL
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)： 14/48頁
文件大?。?/td> 656K
代理商： DS89C450-ENL
DS89C430/DS89C440/DS89C450 Ultra-High-Speed Flash Microcontrollers
14 of 48
Figure 5. Functional Diagram
CONTROL
AND
SEQUENCER
INTERNAL
REGISTERS
DECODER
IR
INTERRUPT
CPU
SERIAL I/O
TIMER/
COUNTERS
1kB x 8
RAM
16kB/32kB
64kB x 8
FLASH
I/O PORTS
SFRs
DPTR
DPTR1
SP
PC
AR INC
AR
WATCHDOG TIMER
AND
POWER MANAGER
CLOCK
AND
RESET
MEMORY
CONTROL
ROM
LOADER
X
X
R
P
S
E
A
P
P0 P1
P2
P3
ADDRESS BUS
INTERNAL CONTROL BUS
DETAILED DESCRIPTION
The DS89C430, DS89C440, and DS89C450 are pin compatible with all three packages of the standard 8051 and
include standard resources such as three timer/counters, serial port, and four 8-bit I/O ports. The three part
numbers vary only by the amount of internal flash memory (DS89C430 = 16kB, DS89C440 = 32kB, DS89C450 =
64kB), which can be in-system/in-application programmed from a serial port using ROM-resident or user-defined
loader software. For volume deployments, the flash can also be loaded externally using standard commercially
available parallel programmers.
Besides greater speed, the DS89C430/DS89C440/DS89C450 include 1kB of data RAM, a second full hardware
serial port, seven additional interrupts, two extra levels of interrupt priority, programmable watchdog timer,
brownout monitor, and power-fail reset. Dual data pointers (DPTRs) are included to speed up block data-memory
moves with further enhancements coming from selectable automatic increment/decrement and toggle select
operation. The speed of MOVX data memory access can be adjusted by adding stretch values up to 10 machine
cycles for flexibility in selecting external memory and peripherals.
A power management mode consumes significantly lower power by slowing the CPU execution rate from one clock
period per cycle to 1024 clock periods per cycle. A selectable switchback feature can automatically cancel this
mode to enable normal speed responses to interrupts.
For EMI-sensitive applications, the microcontroller can disable the ALE signal when the processor is not accessing
external memory.
Dallas Semiconductor
DS89C430/DS89C440/
DS89C450
相關(guān)PDF資料
PDF描述
DS89C450-MNL Ultra-High-Speed Flash Microcontrollers
DS89C450-QNL Ultra-High-Speed Flash Microcontrollers
DS89C430-DS89C450 Ultra-High-Speed Flash Microcontrollers
DS89C450 RES,Wirewound,301Ohms,1+/-% Tol,-20,20ppm-TC,4427-Case
DS907X SipStik Connectors
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS89C450-ENL+ 功能描述:8位微控制器 -MCU Ultra-High-Speed Flash MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
DS89C450-K00 功能描述:開發(fā)板和工具包 - 8051 RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評估:C8051F960, Si7005 核心: 接口類型:USB 工作電源電壓:
DS89C450-KIT# 功能描述:開發(fā)板和工具包 - 8051 Ultra-High-Speed Flash MCU RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評估:C8051F960, Si7005 核心: 接口類型:USB 工作電源電壓:
DS89C450-MNG 功能描述:8位微控制器 -MCU Ultra-High-Speed Flash MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
DS89C450-MNG+ 功能描述:8位微控制器 -MCU Ultra-High-Speed Flash MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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