- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄3831 > ATMEGA6450-16AI (Atmel)IC AVR MCU FLASH 64K 5V 100TQFP PDF資料下載
參數(shù)資料
| 型號： | ATMEGA6450-16AI |
| 廠商： | Atmel |
| 文件頁數(shù)： | 57/85頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AVR MCU FLASH 64K 5V 100TQFP |
| 產(chǎn)品培訓(xùn)模塊： | megaAVR Introduction |
| 標(biāo)準(zhǔn)包裝： | 90 |
| 系列： | AVR® ATmega |
| 核心處理器： | AVR |
| 芯體尺寸： | 8-位 |
| 速度： | 16MHz |
| 連通性： | SPI，UART/USART，USI |
| 外圍設(shè)備： | 欠壓檢測/復(fù)位，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 68 |
| 程序存儲器容量： | 64KB（32K x 16） |
| 程序存儲器類型： | 閃存 |
| EEPROM 大?。?/td> | 2K x 8 |
| RAM 容量： | 4K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 8x10b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 100-TQFP |
| 包裝： | 托盤 |
| 配用： | ATSTK600-TQFP100-ND - STK600 SOCKET/ADAPTER 100-TQFP ATSTK504-ND - STARTER KIT AVR EXP MOD 100P LCD |
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頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁當(dāng)前第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁
32
2570N–AVR–05/11
ATmega325/3250/645/6450
Applying an external clock source to TOSC1 can be done if EXTCLK in the ASSR Register is
written to logic one. See “Asynchronous Operation of Timer/Counter2” on page 141 for further
description on selecting external clock as input instead of a 32kHz crystal.
9.9
System Clock Prescaler
The Atmel ATmega325/3250/645/6450 system clock can be divided by setting the “CLKPR –
Clock Prescale Register” on page 33. This feature can be used to decrease power consumption
when the requirement for processing power is low. This can be used with all clock source
options, and it will affect the clock frequency of the CPU and all synchronous peripherals. clk
I/O,
clk
9.9.1
Switching Time
When switching between prescaler settings, the System Clock Prescaler ensures that no
glitches occur in the clock system and that no intermediate frequency is higher than neither the
clock frequency corresponding to the previous setting, nor the clock frequency corresponding to
the new setting.
The ripple counter that implements the prescaler runs at the frequency of the undivided clock,
which may be faster than the CPU’s clock frequency. Hence, it is not possible to determine the
state of the prescaler – even if it were readable, and the exact time it takes to switch from one
clock division to another cannot be exactly predicted.
From the time the CLKPS values are written, it takes between T1 + T2 and T1 + 2*T2 before the
new clock frequency is active. In this interval, 2 active clock edges are produced. Here, T1 is the
previous clock period, and T2 is the period corresponding to the new prescaler setting.
9.10
Register Description
9.10.1
OSCCAL – Oscillator Calibration Register
Bits 7:0 – CAL7:0: Oscillator Calibration Value
The Oscillator Calibration Register is used to trim the Calibrated Internal RC Oscillator to
remove process variations from the oscillator frequency. A pre-programmed calibration value is
automatically written to this register during chip reset, giving the Factory calibrated frequency as
specified in Table 28-2 on page 300. The application software can write this register to change
the oscillator frequency. The oscillator can be calibrated to frequencies as specified in Table 28-
2 on page 300. Calibration outside that range is not guaranteed.
Note that this oscillator is used to time EEPROM and Flash write accesses, and these write
times will be affected accordingly. If the EEPROM or Flash are written, do not calibrate to more
than 8.8MHz. Otherwise, the EEPROM or Flash write may fail.
The CAL7 bit determines the range of operation for the oscillator. Setting this bit to 0 gives the
lowest frequency range, setting this bit to 1 gives the highest frequency range. The two fre-
quency ranges are overlapping, in other words a setting of OSCCAL = 0x7F gives a higher
frequency than OSCCAL = 0x80.
Bit
765
4321
0
CAL7
CAL6
CAL5
CAL4
CAL3
CAL2
CAL1
CAL0
OSCCAL
Read/Write
R/W
Initial Value
Device Specific Calibration Value
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ATMEGA645-16MI | IC AVR MCU FLASH 64K 5V 64QFN |
| ATMEGA645-16AI | IC AVR MCU FLASH 64K 5V 64TQFP |
| AT80251G2D-3CSUM | IC 8051 MCU ROMLESS 40DIP |
| PIC18F6493-I/PT | IC PIC MCU FLASH 8KX16 64TQFP |
| DSPIC33FJ32MC304-E/PT | IC DSPIC MCU/DSP 32K 44-TQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ATmega6450-16AU | 功能描述:8位微控制器 -MCU AVR 64K FLASH 2K EE 4K SRAM ADC 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(fēng)格:SMD/SMT |
| ATMEGA6450-16AUR | 功能描述:8位微控制器 -MCU AVR 64KB FLSH 2KB EE 4KB SRAM-16MHz, 5V 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(fēng)格:SMD/SMT |
| ATMEGA6450A-AU | 功能描述:8位微控制器 -MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND 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(fēng)格:SMD/SMT |
| ATMEGA6450A-AUR | 功能描述:8位微控制器 -MCU AVR 64KB FLSH 2KB EE 4KB SRAM-20MHz, IND 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(fēng)格:SMD/SMT |
| ATMEGA6450P-AU | 功能描述:8位微控制器 -MCU AVR 64KB FLSH 2KB EE 4KB SRAM-16MHz, IND 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(fēng)格:SMD/SMT |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。