參數(shù)資料
型號: ATMEGA164A-PU
廠商: Atmel
文件頁數(shù): 111/160頁
文件大?。?/td> 0K
描述: IC MCU AVR 16K 20MHZ 40PDIP
產品培訓模塊: MCU Product Line Introduction
megaAVR Introduction
標準包裝: 14
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
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 16KB(8K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 512 x 8
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
數(shù)據轉換器: A/D 8x10b
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
配用: ATSTK600-RC05-ND - STK600 ROUTING CARD AVR
54
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
11.2
Internal Voltage Reference
ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P features an internal bandgap ref-
erence. This reference is used for Brown-out Detection, and it can be used as an input to the
Analog Comparator or the ADC.
11.2.1
Voltage Reference Enable Signals and Start-up Time
The voltage reference has a start-up time that may influence the way it should be used. The
start-up time is given in ”” on page 337. To save power, the reference is not always turned on.
The reference is on during the following situations:
1.
When the BOD is enabled (by programming the BODLEVEL [2:0] Fuse).
2.
When the bandgap reference is connected to the Analog Comparator (by setting the
ACBG bit in ACSR).
3.
When the ADC is enabled.
Thus, when the BOD is not enabled, after setting the ACBG bit or enabling the ADC, the user
must always allow the reference to start up before the output from the Analog Comparator or
ADC is used. To reduce power consumption in Power-down mode, the user can avoid the three
conditions above to ensure that the reference is turned off before entering Power-down mode.
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