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參數(shù)資料
| 型號(hào)： | ATmega8535 |
| 廠商： | Atmel Corp. |
| 元件分類(lèi)： | 8位微控制器 |
| 英文描述： | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| 中文描述： | 位AVR微控制器具有8K字節(jié)的系統(tǒng)內(nèi)可編程閃存 |
| 文件頁(yè)數(shù)： | 100/152頁(yè) |
| 文件大?。?/td> | 2528K |
| 代理商： | ATMEGA8535 |
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302
8021G–AVR–03/11
ATmega329P/3290P
27.7
Parallel Programming
27.7.1
Enter Programming Mode
The following algorithm puts the device in Parallel (High-voltage) Programming mode:
1.
Set Prog_enable pins listed in Table 27-10 on page 301 to “0000”, RESET pin and V
CC to
0V.
2.
Apply 4.5 - 5.5V between V
CC and GND.
3.
Ensure that V
CC reaches at least 1.8V within the next 20 s.
4.
Wait 20 - 60 s, and apply 11.5 - 12.5V to RESET.
5.
Keep the Prog_enable pins unchanged for at least 10s after the High-voltage has been
applied to ensure the Prog_enable Signature has been latched.
6.
Wait at least 300 s before giving any parallel programming commands.
7.
Exit Programming mode by power the device down or by bringing RESET pin to 0V.
If the rise time of the V
CC is unable to fulfill the requirements listed above, the following alterna-
tive algorithm can be used.
1.
Set Prog_enable pins listed in Table 27-10 on page 301 to “0000”, RESET pin to 0V and
V
CC to 0V.
2.
Apply 4.5 - 5.5V between V
CC and GND.
3.
Monitor V
CC, and as soon as VCC reaches 0.9 - 1.1V, apply 11.5 - 12.5V to RESET.
4.
Keep the Prog_enable pins unchanged for at least 10s after the High-voltage has been
applied to ensure the Prog_enable Signature has been latched.
5.
Wait until V
CC actually reaches 4.5 -5.5V before giving any parallel programming
commands.
6.
Exit Programming mode by power the device down or by bringing RESET pin to 0V.
27.7.2
Considerations for Efficient Programming
The loaded command and address are retained in the device during programming. For efficient
programming, the following should be considered.
The command needs only be loaded once when writing or reading multiple memory locations.
Skip writing the data value 0xFF, that is the contents of the entire EEPROM (unless the
EESAVE Fuse is programmed) and Flash after a Chip Erase.
Address high byte needs only be loaded before programming or reading a new 256 word
window in Flash or 256 byte EEPROM. This consideration also applies to Signature bytes
reading.
27.7.3
Chip Erase
The Chip Erase will erase the Flash and EEPROM
(1) memories plus Lock bits. The Lock bits are
not reset until the program memory has been completely erased. The Fuse bits are not
changed. A Chip Erase must be perfor med before the Flash and/or EEPROM are
reprogrammed.
Note:
1. The EEPRPOM memory is preserved during Chip Erase if the EESAVE Fuse is programmed.
Load Command “Chip Erase”
1.
Set XA1, XA0 to “10”. This enables command loading.
2.
Set BS1 to “0”.
3.
Set DATA to “1000 0000”. This is the command for Chip Erase.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ATmega8535-16AC | 功能描述:8位微控制器 -MCU AVR 8K FLASH 512B SRAM 512B EE 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| ATMEGA8535-16AI | 功能描述:8位微控制器 -MCU AVR 8K FLASH 512B SRAM 512B EE 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| ATMEGA8535-16AJ | 功能描述:IC MCU AVR 8K 5V 16MHZ 44-TQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:AVR® ATmega 標(biāo)準(zhǔn)包裝:9 系列:87C 核心處理器:8051 芯體尺寸:8-位 速度:40/20MHz 連通性:UART/USART 外圍設(shè)備:POR，WDT 輸入/輸出數(shù):32 程序存儲(chǔ)器容量:32KB（32K x 8） 程序存儲(chǔ)器類(lèi)型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:40-DIP（0.600"，15.24mm） 包裝:管件 |
| ATmega8535-16AU | 功能描述:8位微控制器 -MCU 8kB Flash 0.5kB EEPROM 32 I/O Pins 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| ATMEGA8535-16AUR | 功能描述:8位微控制器 -MCU AVR 8K FLSH 544B SRAM 512B EE-16MHz 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
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