參數(shù)資料
型號: ATMEGA164P-B15AZ
廠商: Atmel
文件頁數(shù): 45/70頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 16KB FLASH 44TQFP
標準包裝: 1,500
系列: AVR® ATmega
核心處理器: AVR
芯體尺寸: 8-位
速度: 16MHz
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): 2.7 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 ~ 125°C
封裝/外殼: 44-TQFP
包裝: 帶卷 (TR)
其它名稱: ATMEGA164P-B15AZ-ND
34
7674F–AVR–09/09
ATmega164P/324P/644P
Notes:
1. These options should only be used when not operating close to the maximum frequency of the
device, and only if frequency stability at start-up is not important for the application. These
options are not suitable for crystals.
2. These options are intended for use with ceramic resonators and will ensure frequency stability
at start-up. They can also be used with crystals when not operating close to the maximum fre-
quency of the device, and if frequency stability at start-up is not important for the application.
7.5
Low Frequency Crystal Oscillator
The Low-frequency Crystal Oscillator is optimized for use with a 32.768 kHz watch crystal.
When selecting crystals, load capasitance and crystal’s Equivalent Series Resistance, ESR
must be taken into consideration. Both values are specified by the crystal vendor.
ATmega164P/324P/644P oscillator is optimized for very low power consumption, and thus when
selecting crystals, see Table 7-7 on page 34 for maximum ESR recommendations on 9 pF and
12.5 pF crystals
Table 7-7.
Maximum ESR Recommendation for 32.768 kHz Watch Crystal
Note:
1. Maximum ESR is typical value based on characterization
The Low-frequency Crystal Oscillator provides an internal load capacitance of typical 8.0 pF.
Crystals with recommended 8.0 pF load capacitance can be without external capacitors as
Table 7-6.
Start-up Times for the Full Swing Crystal Oscillator Clock Selection
Oscillator Source /
Power Conditions
Start-up Time from
Power-down and
Power-save
Additional Delay
from Reset
(VCC = 5.0V)
CKSEL0
SUT1..0
Ceramic resonator, fast
rising power
258 CK
14CK + 4.1 ms(1)
000
Ceramic resonator, slowly
rising power
258 CK
14CK + 65 ms(1)
001
Ceramic resonator, BOD
enabled
1K CK
14CK(2)
010
Ceramic resonator, fast
rising power
1K CK
14CK + 4.1 ms(2)
011
Ceramic resonator, slowly
rising power
1K CK
14CK + 65 ms(2)
100
Crystal Oscillator, BOD
enabled
16K CK
14CK
1
01
Crystal Oscillator, fast
rising power
16K CK
14CK + 4.1 ms
1
10
Crystal Oscillator, slowly
rising power
16K CK
14CK + 65 ms
1
11
Crystal CL (pF)
Max ESR [k
9.0
65
12.5
30
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