參數(shù)資料
型號: ATMEGA1284-AU
廠商: Atmel
文件頁數(shù): 18/160頁
文件大?。?/td> 0K
描述: IC MCU AVR 128K FLASH 44TQFP
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
megaAVR Introduction
標(biāo)準(zhǔn)包裝: 160
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-TQFP
包裝: 托盤
配用: ATSTK600-RC31-ND - STK600 ROUTING CARD AVR
114
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
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 returns the TCNTn value in the r17:r16 register pair.
It is important to notice that accessing 16-bit registers are atomic operations. If an interrupt
occurs between the two instructions accessing the 16-bit register, and the interrupt code
updates the temporary register by accessing the same or any other of the 16-bit Timer Regis-
ters, then the result of the access outside the interrupt will be corrupted. Therefore, when both
the main code and the interrupt code update the temporary register, the main code must disable
the interrupts during the 16-bit access.
Assembly Code Examples (1)
...
; Set TCNT
n to 0x01FF
ldi
r17,0x01
ldi
r16,0xFF
out
TCNT
nH,r17
out
TCNT
nL,r16
; Read TCNT
n into r17:r16
in
r16,TCNT
nL
in
r17,TCNT
nH
...
C Code Examples (1)
unsigned int
i;
...
/* Set TCNT
n to 0x01FF */
TCNT
n = 0x1FF;
/* Read TCNT
n into i */
i = TCNT
n;
...
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