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參數資料
| 型號： | DS80C390-FNR+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 39/53頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MPU CAN DUAL HS IND 64-LQFP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 160 |
| 系列： | 80C |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 40MHz |
| 連通性： | CAN，EBI/EMI，SIO，UART/USART |
| 外圍設備： | 電源故障復位，WDT |
| 輸入/輸出數： | 32 |
| 程序存儲器類型： | ROMless |
| RAM 容量： | 4K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 3.85 V ~ 5.5 V |
| 振蕩器型： | 外部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 64-LQFP |
| 包裝： | 托盤 |
| 產品目錄頁面： | 703 (CN2011-ZH PDF) |
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DS80C390 Dual CAN High-Speed Microprocessor
44 of 53
POWER-FAIL RESET
The microcontroller incorporates an internal precision bandgap voltage reference and comparator circuit that
provide a power-on and power-fail reset function. This circuit monitors the processor’s incoming power supply
voltage (VCC), and holds the processor in reset while VCC is below the minimum voltage level. When power exceeds
the reset threshold, a full power-on reset is performed. In this way, this internal voltage monitoring circuitry handles
both power-up and power-down conditions without the need for additional external components.
Once VCC has risen above VRST, the device automatically restarts the oscillator for the external crystal and counts
65,536 clock cycles before program execution begins at location 0000h. This helps the system maintain reliable
operation by only permitting processor operation when the supply voltage is in a known good state. Software can
determine that a power-on reset has occurred by checking the power-on reset flag (POR;WDCON.6). Software
should clear the POR bit after reading it.
POWER-FAIL INTERRUPT
The bandgap voltage reference that sets a precise reset threshold also generates an optional early warning power-
fail interrupt (PFI). When enabled by software, the processor vectors to ROM address 0033h if VCC drops below
VPFW. PFI has the highest priority. The PFI enable is in the watchdog control SFR (EPFI;WDCON.5). Setting this bit
to logic 1 enables the PFI. Application software can also read the PFI flag at WDCON.4. A PFI condition sets this
bit to 1. The flag is independent of the interrupt enable and must be cleared by software.
EXTERNAL RESET PINS
The DS80C390 has reset input (RST) and reset output (
RSTOL) pins. The RSTOL pin supplies an active-low reset
when the microprocessor is issued a reset from either a high on the RST pin, a timeout of the watchdog timer, a
crystal oscillator fail, or an internally detected power fail. The timing of the
RSTOL pin is dependent on the source of
the reset.
RESET TYPE/SOURCE
RSTOL DURATION
Power-On Reset
65,536 tCLCL (as described in Power Cycle Timing Characteristics)
External Reset
<1.25 machine cycles
Power Fail
65,536 tCLCL (as described in Power Cycle Timing Characteristics)
Watchdog Timer Reset
2 machine cycles
Oscillator-Fail Detect
65,536 tCLCL (as described in Power Cycle Timing Characteristics)
INTERRUPTS
The microcontroller provides 16 interrupt sources with three priority levels. All interrupts, with the exception of the
power-fail interrupt, are controlled by a series combination of individual enable bits and a global interrupt-enable,
EA (IE.7). Setting EA to 1 allows individual interrupts to be enabled. Clearing EA disables all interrupts regardless
of their individual enable settings.
The three available priority levels are low, high, and highest. The highest priority level is reserved for the power-fail
interrupt only. All other interrupt priority levels have individual priority bits that, when set to 1, establish the
particular interrupt as high priority. In addition to the user-selectable priorities, each interrupt also has an inherent
natural priority, used to determine the priority of simultaneously occurring interrupts. The available interrupt
sources, their flags, their enables, their natural priority, and their available priority selection bits are identified in
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相關代理商/技術參數 |
參數描述 |
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| DS80C390-FNR+ | 功能描述:8位微控制器 -MCU Dual CAN High-Speed RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 安裝風格:SMD/SMT |
| DS80C390-QCR | 功能描述:8位微控制器 -MCU Dual CAN High-Speed RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 安裝風格:SMD/SMT |
| DS80C390-QCR+ | 功能描述:8位微控制器 -MCU Dual CAN High-Speed RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 安裝風格:SMD/SMT |
| DS80C390-QNR | 功能描述:8位微控制器 -MCU Dual CAN High-Speed RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 安裝風格:SMD/SMT |
| DS80C390-QNR+ | 功能描述:8位微控制器 -MCU Dual CAN High-Speed RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 安裝風格:SMD/SMT |
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