- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄3787 > DS89C440-ENG (Maxim Integrated Products)IC MCU FLASH 32KB 25MHZ 44-TQFP PDF資料下載
參數(shù)資料
| 型號： | DS89C440-ENG |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 18/46頁 |
| 文件大小： | 0K |
| 描述： | IC MCU FLASH 32KB 25MHZ 44-TQFP |
| 標準包裝： | 160 |
| 系列： | 89C |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 25MHz |
| 連通性： | EBI/EMI，SIO，UART/USART |
| 外圍設(shè)備： | 電源故障復(fù)位，WDT |
| 輸入/輸出數(shù)： | 32 |
| 程序存儲器容量： | 32KB（32K x 8） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 1K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 4.5 V ~ 5.5 V |
| 振蕩器型： | 外部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 44-TQFP |
| 包裝： | 托盤 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁
DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
25 of 46
ROM Loader
The full on-chip flash program memory space, security flash block, and external SRAM can be programmed in-
system from an external source through serial port 0 under the control of a built-in ROM loader. The ROM loader
also has an auto-baud feature that determines which baud-rate frequencies are being used for communication and
sets the baud-rate generator for that speed.
When the DS89C430 is powered up and has entered its user operating mode, the ROM loader mode can be
invoked at any time by forcing RST = 1, EA = 0, and PSEN = 0. It remains in effect until power-down or when the
condition (RST = 1 and PSEN = EA = 0) is removed. Entering the ROM loader mode forces the processor to start
fetching from the 2kB internal ROM for program memory initialization and other loader functions.
The read/write accessibility is determined by the state of the lock bits, which can be verified directly by the ROM
loader.
The flash memory can be programmed (by the built-in ROM loader) using commands that are received over the
serial interface from a host PC. Full details of the ROM loader commands are given in the Ultra-High-Speed Flash
Microcontroller User’s Guide. Host software to communicate with the ROM loader is available in Windows format
as well as other platforms. Contact our technical support department at www.maxim-ic.com/support for more
information.
Parallel Programming Mode
The microcontroller also supports a programming mode such as that used by commercial device programmers.
This mode is of little utility in normal applications and is only used by commercial device programmers. For
information on this mode, contact our technical support department.
Data Pointer Increment/Decrement and Options
The DS89C430 incorporates a hardware feature to assist applications that require data pointer increment/
decrement. Data pointer increment/decrement bits ID0 and ID1 (DPS.6 and DPS.7) define how the INC DPTR
instruction functions in relation to the active DPTR (selected by the SEL bit). Setting ID0 = 1 and SEL = 0 enables
the decrement operation for DPTR, and execution of the INC DPTR instruction decrements the DPTR contents
by 1. Similarly, setting ID1 = 1 and SEL = 1 enables the decrement operation for DPTR1, and execution of the INC
DPTR instruction decrements the DPTR1 contents by 1. With this feature, the user can configure the data pointers
to operate in four ways for the INC DPTR instruction:
ID1
ID0
SEL = 0
SEL = 1
0
INC DPTR
INC DPTR1
0
1
DEC DPTR
INC DPTR1
1
0
INC DPTR
DEC DPTR1
1
DEC DPTR
DEC DPTR1
SEL (DPS.0) bit always selects the active data pointer. The DS89C430 offers a programmable option that allows
any instructions related to data pointer to toggle the SEL bit automatically. This option is enabled by setting the
toggle-select-enable bit (TSL–DPS.5) to a logic 1. Once enabled, the SEL bit is automatically toggled after the
execution of one of the following five DPTR-related instructions:
INC DPTR
MOV DPTR #data16
MOVC A, @A+DPTR
MOVX A, @DPTR
MOVX @DPTR, A
The DS89C430 also offers a programmable option that automatically increases (or decreases) the contents of the
selected data pointer by 1 after the execution of a DPTR-related instruction. The actual function (increment or
decrement) is dependent on the setting of the ID1 and ID0 bits. This option is enabled by setting the automatic
increment/decrement enable (AID–DPS.4) to a logic 1 and is affected by the following three instructions:
MOVC A, @A+DPTR
MOVX A, @DPTR
MOVX @DPTR, A
Windows is a registered trademark of Microsoft Corporation.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC9S08GT60ACBE | IC MCU 60K FLASH 4K RAM 42-SDIP |
| DS89C430-ENL | IC MCU FLASH 16KB 33MHZ 44-TQFP |
| MCF52221CAF66 | IC MCU 128K FLASH 66MHZ 100-LQFP |
| DS80C320-ECG/T&R | IC MCU HI SPEED 25MHZ 44-TQFP |
| DS87C530-ENL | IC MCU EPR/ROM W/RTC 33MZ 52TQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS89C440-ENL | 功能描述:IC MCU FLASH 32KB 33MHZ 44-TQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:89C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設(shè)備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件 |
| DS89C440-ENL+ | 功能描述:8位微控制器 -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 安裝風格:SMD/SMT |
| DS89C440-MNG | 功能描述:IC MCU FLASH 32KB 25MHZ 40-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:89C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設(shè)備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件 |
| DS89C440-MNL | 功能描述:IC MCU FLASH 32KB 33MHZ 40-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:89C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設(shè)備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件 |
| DS89C440-MNL+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。