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参数资料
| 型号： | DS80C400-FNY |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 41/97页 |
| 文件大小： | 0K |
| 描述： | IC MCU 75MHZ 16MB HP 100-LQFP |
| 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： | 90 |
| 系列： | 80C |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 75MHz |
| 连通性： | 1 线，CAN，EBI/EMI，以太网，SIO，UART/USART |
| 外围设备： | 电源故障复位，WDT |
| 输入/输出数： | 64 |
| 程序存储器容量： | 64KB（64K x 8） |
| 程序存储器类型： | ROM |
| RAM 容量： | 1K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.62 V ~ 3.6 V |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 100-LQFP |
| 包装： | 托盘 |
| 配用： | DS80C400-KIT#-ND - EVAL KIT FOR DS80C400 |
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DS80C400 Network Microcontroller
46 of 97
Auto-Increment/Decrement (if AID = 1)
MOVC A, @A+DPTR
MOVX A, @DPTR
MOVX @DPTR, A
When used in conjunction, the auto-toggle and auto-increment/decrement features can produce very fast and
efficient routines for copying or moving data. For example, suppose you want to copy three bytes of data from a
source location (pointed to by DPTR2) to a destination location (pointed to by DPTR3). Assuming that DPTR2 is
the active pointer (SEL1 = 1, SEL = 0), with TSL = 1 and AID = 1, the instruction sequence below copies the three
bytes:
MOVX A, @DPTR
MOVX @DPTR, A
MOVX A, @DPTR
MOVX @DPTR, A
MOVX A, @DPTR
MOVX @DPTR, A
Stretch Memory Cycles
The DS80C400 allows user-application software to select the number of machine cycles it takes to execute a
MOVX instruction, allowing access to both fast and slow off-chip data memory and/or peripherals without glue
logic. High-speed systems often include memory-mapped peripherals such as LCDs or UARTs with slow access
times, so it may not be necessary or desirable to access external devices at full speed. The microprocessor can
perform a MOVX instruction in as little as two machine cycles or as many as 12 machine cycles. Accesses to
internal MOVX SRAM always use two cycles. Note that stretch cycle settings affect external MOVX memory
operations only and there is no way to slow the accesses to program memory other than to use a slower crystal (or
external clock).
External MOVX timing is governed by the selection of 0-to-7 stretch cycles, controlled by the MD2–MD0 SFR bits in
the clock control register (CKCON.2–0). A stretch of 0 results in a 2-machine cycle MOVX instruction. A stretch of 7
results in a MOVX of 12 machine cycles. Software can dynamically change the stretch value depending on the
particular memory or peripheral being accessed. The default of one stretch cycle allows the use of commonly
available SRAMs without dramatically lengthening the memory access times.
Stretch cycle settings affect external MOVX timing in three gradations. Changing the stretch value from 0 to 1 adds
an additional clock cycle each to the data setup and hold times. Stretch values of 2 and 3 each stretch the WR or
RD
signal by an additional machine cycle. When a stretch value of 4 or above is selected, the interface timing
changes dramatically to allow for very slow peripherals. First, the ALE signal is lengthened by one machine cycle.
This increases the address setup time into the peripheral by this amount. Next, the address is held on the bus for
one additional machine cycle, increasing the address hold time by this amount. The WR and RD signals are then
lengthened by a machine cycle. Finally, during a MOVX write the data is held on the bus for one additional machine
cycle, thereby increasing the data hold time by this amount. For every stretch value greater than 4, the setup and
hold times remain constant, and only the width of the read or write signal is increased. These three gradations are
reflected in the AC Electrical Characteristics section, where the eight MOVX timing specifications are represented
by only three timing diagrams.
The reset default of one stretch cycle results in a three-cycle MOVX for any external access. Therefore, the default
off-chip RAM access is not at full speed. This is a convenience to existing designs that use slower RAM. When
maximum speed is desired, software should select a stretch value of 0. When using very slow RAM or peripherals,
the application software can select a larger stretch value.
The specific timing of MOVX instructions as a function of stretch settings is provided in the Electrical Specifications
section of this data sheet. As an example, Table 9 shows the read and write strobe widths corresponding to each
stretch value.
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| DS8102+ | IC MODULATOR/DECODER 16-TSSOP |
| DS8113-JNG+ | IC INTERFACE SMART CARD 28-TSSOP |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS80C400-FNY+ | 功能描述:8位微控制器 -MCU Network MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| DS80C400-KIT | 功能描述:EVAL KIT FOR DS80C400 RoHS:否 类别:编程器，开发系统 >> 通用嵌入式开发板和套件（MCU、DSP、FPGA、CPLD等） 系列:- 产品培训模块:Blackfin® Processor Core Architecture Overview Blackfin® Device Drivers Blackfin® Optimizations for Performance and Power Consumption Blackfin® System Services 特色产品:Blackfin? BF50x Series Processors 标准包装:1 系列:Blackfin® 类型:DSP 适用于相关产品:ADSP-BF548 所含物品:板，软件，4x4 键盘，光学拨轮，QVGA 触摸屏 LCD 和 40G 硬盘 配用:ADZS-BFBLUET-EZEXT-ND - EZ-EXTENDER DAUGHTERBOARDADZS-BFLLCD-EZEXT-ND - BOARD EXT LANDSCAP LCD INTERFACE 相关产品:ADSP-BF542BBCZ-4A-ND - IC DSP 16BIT 400MHZ 400CSBGAADSP-BF544MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF542MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF542KBCZ-6A-ND - IC DSP 16BIT 600MHZ 400CSBGAADSP-BF547MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF548BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF547BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF544BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF542BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGA |
| DS80C400-KIT# | 功能描述:开发板和工具包 - 8051 RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:C8051F960, Si7005 核心: 接口类型:USB 工作电源电压: |
| DS80C410 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Network Microcontrollers with Ethernet and CAN |
| DS80C410_09 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Network Microcontrollers with Ethernet and CAN |
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