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參數(shù)資料
| 型號(hào)： | ADUC814 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | MicroConverter, Small Package 12-Bit ADC with Embedded Flash MCU |
| 中文描述： | MicroConverter的，小包裝12位ADC，嵌入式閃存MCU |
| 文件頁數(shù)： | 33/72頁 |
| 文件大?。?/td> | 846K |
| 代理商： | ADUC814 |
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ADuC814
FLASH/EE MEMORY TIMING
The typical program/erase times for the Flash/EE data memory
are
Rev. A | Page 33 of 72
Erase Full Array (640 bytes)
Erase Single Page (4 bytes)
Program Page (4 bytes)
Read Page (4 bytes)
Using the Flash/EE Memory Interface
As with all Flash/EE memory architectures, the array can be
programmed in-system at a byte level, although it must be
erased first, the erasure being performed in page blocks (4-byte
pages in this case).
2 ms
2 ms
250 μs
Within single instruction cycle
A typical access to the Flash/EE data array involves setting up
the page address to be accessed in the EADRL SFR, configuring
the EDATA1–4 with data to be programmed to the array (the
EDATA SFRs are not written to for read accesses), and finally,
writing the ECON command word, which initiates one of the
modes shown Table 11.
Note that a given mode of operation is initiated as soon as the
command word is written to the ECON SFR. The core micro-
controller operation on the ADuC814 is idled until the
requested program/read or erase mode is completed. In
practice, this means that even though the Flash/EE memory
mode of operation is typically initiated with a two-machine
cycle MOV instruction (to write to the ECON SFR), the next
instruction cannot be executed until the Flash/EE operation is
complete (250 μs or 2 ms later). This means that the core does
not respond to interrupt requests until the Flash/EE operation is
complete, though the core peripheral functions like counter/
timers continue to count and time as configured throughout
this period. Although the 640-byte user Flash/EE array is
shipped from the factory pre-erased, i.e., byte locations set to
FFH, it is nonetheless good programming practice to include an
ERASE-ALL routine as part of any configuration/setup code
running on the ADuC814. An ERASE-ALL command consists
of writing 06H to the ECON SFR, which initiates an erasure of
all 640 byte locations in the Flash/EE array. This command
coded in 8051 assembly appears as
MOV ECON, #06H
Programming a Byte
In general terms, a byte in the Flash/EE array can be programmed
only if it has been erased previously. To be more specific, a byte
can only be programmed if it already holds the value FFH.
Because of the Flash/EE architecture, this erasure must happen
at a page level; therefore, a minimum of four bytes (1 page) are
erased when an ERASE command is initiated.
; Erase all Command
; 2 ms Duration
A more specific example of the program-byte process is shown
below. In this example the user writes F3H into the second byte
on Page 03H of the Flash/EE data memory space while
preserving the other three bytes already in this page. Because
the user is required to modify only one of the page bytes, the
full page must be first read so that this page can then be erased
without the existing data being lost. This example, coded in
8051 assembly, appears as
MOV EADRL,#03H
; Set Page Address
; Pointer
; Read Page
; Write New Byte
; Erase Page
; Write Page
; Program Flash/EE)
MOV ECON,#01H
MOV EDATA2,#0F3H
MOV ECON,#05H
MOV ECON,#02H
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADUC814ARU | MicroConverter, Small Package 12-Bit ADC with Embedded Flash MCU |
| ADUC814ARU-REEL | MicroConverter, Small Package 12-Bit ADC with Embedded Flash MCU |
| ADUC824 | MicroConverter, Dual-Channel 16-/24-Bit ADCs with Embedded FLASH MCU |
| ADUC824BS | MicroConverter, Dual-Channel 16-/24-Bit ADCs with Embedded FLASH MCU |
| ADUC831 | LJT 6C 6#22D PIN RECP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADUC814_02 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter, Small Package 12-Bit ADC with Embedded FLASH MCU |
| ADUC814AN | 功能描述:8052 MicroConverter? ADuC8xx Microcontroller IC 8-Bit 16.78MHz 8KB (8K x 8) FLASH 制造商:analog devices inc. 系列:MicroConverter? ADuC8xx 包裝:- 零件狀態(tài):上次購買時(shí)間 核心處理器:8052 核心尺寸:8-位 速度:16.78MHz 連接性:I2C，SPI，UART/USART 外設(shè):POR，PSM，溫度傳感器，WDT I/O 數(shù):- 程序存儲(chǔ)容量:8KB（8K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 容量:640 x 8 RAM 容量:256 x 8 電壓 - 電源（Vcc/Vdd）:2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:* 振蕩器類型:內(nèi)部 工作溫度:* 封裝/外殼:- 供應(yīng)商器件封裝:- 標(biāo)準(zhǔn)包裝:1 |
| ADUC814ARU | 功能描述:IC ADC 12BIT W/FLASH MCU 28TSSOP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標(biāo)準(zhǔn)包裝:38 系列:Encore!® XP® 核心處理器:eZ8 芯體尺寸:8-位 速度:5MHz 連通性:IrDA，UART/USART 外圍設(shè)備:欠壓檢測/復(fù)位，LED，POR，PWM，WDT 輸入/輸出數(shù):16 程序存儲(chǔ)器容量:4KB（4K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 105°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:管件 其它名稱:269-4116Z8F0413SH005EG-ND |
| ADUC814ARU-D2 | 制造商:Analog Devices 功能描述:12 BIT ADC WITH EMBEDDED 8-BIT MICRO I.C - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:12 BIT ADC WITH EMBEDDED 8-BIT MICRO I.C - Bulk |
| ADUC814ARU-REEL | 制造商:Analog Devices 功能描述:MCU 8-Bit ADuC8xx 8052 CISC 8KB Flash 3V/5V 28-Pin TSSOP T/R 制造商:Analog Devices 功能描述:12 BIT ADC WITH EMBEDDED 8-BIT MICRO I.C - Tape and Reel |
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