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参数资料
型号： AT89C51ED2-SMSUM
厂商： Atmel
文件页数： 16/137页
文件大小： 0K
描述： IC 8051 MCU FLASH 64K 68PLCC
产品培训模块： MCU Product Line Introduction
标准包装： 304
系列： 89C
核心处理器： 8051
芯体尺寸： 8-位
速度： 60MHz
连通性： SPI，UART/USART
外围设备： POR，PWM，WDT
输入/输出数： 50
程序存储器容量： 64KB（64K x 8）
程序存储器类型： 闪存
EEPROM 大小： 2K x 8
RAM 容量： 2K x 8
电压 - 电源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
振荡器型： 外部
工作温度： -40°C ~ 85°C
封装/外壳： 68-PLCC
包装： 管件
配用： AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
112
4235K–8051–05/08
AT89C51RD2/ED2
24.10 API Call Description
The IAP allows to reprogram a microcontroller on-chip Flash memory without removing it from
the system and while the embedded application is running.
The user application can call some Application Programming Interface (API) routines allowing
IAP. These API are executed by the bootloader.
To call the corresponding API, the user must use a set of Flash_api routines which can be linked
with the application.
Example of Flash_api routines are available on the Atmel web site on the software application
note:
C Flash Drivers for the AT89C51RD2/ED2
The API calls description and arguments are shown in Table 24-10.
24.10.1
Process
The application selects an API by setting R1, ACC, DPTR0 and DPTR1 registers.
All calls are made through a common interface “USER_CALL” at the address FFF0h.
The jump at the USER_CALL must be done by LCALL instruction to be able to comeback in the
application.
Before jump at the USER_CALL, the bit ENBOOT in AUXR1 register must be set.
24.10.2
Constraints
The interrupts are not disabled by the bootloader.
Interrupts must be disabled by user prior to jump to the USER_CALL, then re-enabled when
returning.
Interrupts must also be disabled before accessing EEPROM Data then re-enabled after.
The user must take care of hardware watchdog before launching a Flash operation.
Table 24-10. API Call Summary
Command
R1
A
DPTR0
DPTR1
Returned Value
Command Effect
READ MANUF ID
00h
XXh
0000h
XXh
ACC = Manufacturer Id
Read Manufacturer identifier
READ DEVICE ID1
00h
XXh
0001h
XXh
ACC = Device Id 1
Read Device identifier 1
READ DEVICE ID2
00h
XXh
0002h
XXh
ACC = Device Id 2
Read Device identifier 2
READ DEVICE ID3
00h
XXh
0003h
XXh
ACC = Device Id 3
Read Device identifier 3
ERASE BLOCK
01h
XXh
DPH = 00h
00h
ACC = DPH
Erase block 0
DPH = 20h
Erase block 1
DPH = 40h
Erase block 2
DPH = 80h
Erase block 3
DPH = C0h
Erase block 4
PROGRAM DATA BYTE
02h
Vaue to write
Address of
byte to
program
XXh
ACC = 0: DONE
Program up one data byte in the on-chip
flash memory.
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相关代理商/技术参数
参数描述
AT89C51ED2-UM 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Flash Microcontroller
AT89C51IC2 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Flash Microcontroller with 2-wire Interface
AT89C51IC2_04 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Flash Microcontroller with 2-wire Interface
AT89C51IC2_08 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Flash Microcontroller with 2-wire Interface
AT89C51IC2-RLRIL 功能描述:IC MCU FLASH 8051 32K 3V 44-VQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:89C 标准包装:1 系列:AVR® ATmega 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C，SPI，UART/USART 外围设备:欠压检测/复位，POR，PWM，WDT 输入/输出数:32 程序存储器容量:32KB（16K x 16） 程序存储器类型:闪存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:44-TQFP 包装:剪切带 (CT) 其它名称:ATMEGA324P-B15AZCT
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