參數(shù)資料
型號： ATMEGA1284-MUR
廠商： Atmel
文件頁數(shù)： 20/160頁
文件大小： 0K
描述： IC MCU AVR 128K FLASH 44QFN
產(chǎn)品培訓(xùn)模塊： megaAVR Introduction
標(biāo)準(zhǔn)包裝： 1
系列： AVR® ATmega
核心處理器： AVR
芯體尺寸： 8-位
速度： 20MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： 欠壓檢測/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 128KB（64K x 16）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 4K x 8
RAM 容量： 16K x 8
電壓 - 電源 (Vcc/Vdd)： 1.8 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： 44-VFQFN 裸露焊盤
包裝： 剪切帶 (CT)
其它名稱： ATMEGA1284-MURCT
116
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
The following code examples show how to do an atomic write of the TCNTn Register contents.
Writing any of the OCRnA/B/C or ICRn Registers can be done by using the same principle.
Note:
1. The example code assumes that the part specific header file is included.
For I/O Registers located in extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SBI”
instructions must be replaced with instructions that allow access to extended I/O. Typically
“LDS” and “STS” combined with “SBRS”, “SBRC”, “SBR”, and “CBR”.
The assembly code example requires that the r17:r16 register pair contains the value to be writ-
ten to TCNTn.
16.3.1
Reusing the Temporary High Byte Register
If writing to more than one 16-bit register where the high byte is the same for all registers written,
then the high byte only needs to be written once. However, note that the same rule of atomic
operation described previously also applies in this case.
16.4
Timer/Counter Clock Sources
The Timer/Counter can be clocked by an internal or an external clock source. The clock source
is selected by the Clock Select logic which is controlled by the Clock Select (CSn2:0) bits
located in the Timer/Counter control Register B (TCCRnB). For details on clock sources and
Assembly Code Example
TIM16_WriteTCNT
n:
; Save global interrupt flag
in
r18,SREG
; Disable interrupts
cli
; Set TCNT
n to r17:r16
out
TCNT
nH,r17
out
TCNT
nL,r16
; Restore global interrupt flag
out
SREG,r18
ret
C Code Example
void
TIM16_WriteTCNT
n( unsigned int i )
{
unsigned char
sreg;
unsigned int
i;
/* Save global interrupt flag */
sreg = SREG;
/* Disable interrupts */
_CLI();
/* Set TCNT
n to i */
TCNT
n = i;
/* Restore global interrupt flag */
SREG = sreg;
}
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ATMEGA1284P 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Atmel Microcontroller with 16/32/64/128K Bytes In-System Programmable Flash
ATMEGA1284P_09 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 128K Bytes In-System Programmable Flash
ATMEGA1284P_1 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 128K Bytes In-System Programmable Flash
ATMEGA1284P-AU 功能描述:8位微控制器 -MCU 128KB Flash 20MHz 1.8V-5.5V 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
ATMEGA1284P-AUR 功能描述:8位微控制器 -MCU AVR,128KB FLASH,1.8V 4KB EE 16KB SRAM 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
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