參數(shù)資料
型號： DS89C450-KIT#
廠商： Maxim Integrated Products
文件頁數(shù)： 33/46頁
文件大小： 0K
描述： KIT MCU FLASH ULTRA HIGH SPEED
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
類型： MCU
適用于相關(guān)產(chǎn)品： DS89C450
所含物品： 板
其它名稱： 90-89450#KIT
DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
39 of 46
Figure 14. System Clock Sources
4X/2X
CTM
CRYSTAL
OSCILLATOR
DIVIDE 1024
RING
OSCILLATOR
CLOCK
MULTIPLIER
CD0
CD1
SELECTOR
RING
ENABLE
MUX
SYSTEM
CLOCK
Bandgap-Monitored Interrupt and Reset Generation
The power monitor in the DS89C430 monitors the VCC pin in relation to the on-chip bandgap voltage reference.
Whenever VCC falls below VPFW, an interrupt is generated if the corresponding power-fail interrupt-enable bit EPFI
(WDCON.5) is set, causing the device to vector to address 33h. The power-fail interrupt status bit PFI (WDCON.4)
is set any time VCC transitions below VPFW, and can only be cleared by software once set. Similarly, as VCC falls
below VRST, a reset is issued internally to halt program execution. Following power-up, a power-on reset initiates a
power-on reset timeout before starting program execution. When VCC is first applied to the DS89C430, the
processor is held in reset until VCC > VRST and a delay of 65,536 oscillator cycles has elapsed, to ensure that power
is within tolerance and the clock source has had time to stabilize. Once the reset timeout period has elapsed, the
reset condition is removed automatically and software execution begins at the reset vector location of 0000h. The
power-on reset flag POR (WDCON.6) is set to logic 1 to indicate a power-on reset has occurred, and can only be
cleared by software.
When the DS89C430 enters stop mode, the bandgap, reset comparator, and power-fail interrupt comparator are
automatically disabled to conserve power if the BGS (EXIF.0) bit is set to logic 0. This is the lowest power mode. If
BGS is set to logic 1, the bandgap reference, reset comparator, and the power-fail comparator are powered up,
although in a mode that reduces their power consumption.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
DS89C450-MNL 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-MNL+ 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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