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参数资料
型号： ATMEGA1284-AUR
厂商： Atmel
文件页数： 20/160页
文件大小： 0K
描述： IC MCU AVR 128K FLASH 44TQFP
产品培训模块： megaAVR Introduction
标准包装： 1
系列： AVR® ATmega
核心处理器： AVR
芯体尺寸： 8-位
速度： 20MHz
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： 128KB（64K x 16）
程序存储器类型： 闪存
EEPROM 大小： 4K x 8
RAM 容量： 16K x 8
电压 - 电源 (Vcc/Vdd)： 1.8 V ~ 5.5 V
数据转换器： A/D 8x10b
振荡器型： 内部
工作温度： -40°C ~ 85°C
封装/外壳： 44-TQFP
包装： 剪切带 (CT)
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
prescaler, see ”Timer/Counter Prescaler” on page 156.
Assembly Code Example
(1)
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
(1)
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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ATMEGA1284-MU 功能描述:8位微控制器 -MCU AVR 128KB FLSH 4KB EE16KB SRAM-20 MHz RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA1284-MUR 功能描述:8位微控制器 -MCU AVR 128KB FLSH 4KB EE16KB SRAM-20 MHz RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA1284P 制造商:ATMEL 制造商全称: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 制造商全称:ATMEL Corporation 功能描述:8-bit Microcontroller with 128K Bytes In-System Programmable Flash
ATMEGA1284P_1 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Microcontroller with 128K Bytes In-System Programmable Flash
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