參數(shù)資料
型號: ATTINY44A-MFR
廠商: Atmel
文件頁數(shù): 59/135頁
文件大小: 0K
描述: MCU AVR 4KB FLASH 20MHZ 20QFN
產(chǎn)品培訓模塊: MCU Product Line Introduction
tinyAVR Introduction
標準包裝: 1
系列: AVR® ATtiny
核心處理器: AVR
芯體尺寸: 8-位
速度: 20MHz
連通性: USI
外圍設備: 欠壓檢測/復位,POR,PWM,溫度傳感器,WDT
輸入/輸出數(shù): 12
程序存儲器容量: 4KB(2K x 16)
程序存儲器類型: 閃存
EEPROM 大小: 256 x 8
RAM 容量: 256 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: 20-WFQFN 裸露焊盤
包裝: 標準包裝
其它名稱: ATTINY44A-MFRDKR
29
8183F–AVR–06/12
ATtiny24A/44A/84A
use with crystals are given in Table 6-9 below. For ceramic resonators, the capacitor values
given by the manufacturer should be used.
Notes:
1. This option should not be used with crystals, only with ceramic resonators.
The Oscillator can operate in three different modes, each optimized for a specific frequency
range. The operating mode is selected by fuses CKSEL[3:1] as shown in Table 6-9.
The CKSEL0 Fuse together with the SUT[1:0] Fuses select the start-up times as shown in Table
Notes:
1. When the BOD has been disabled by software, the wake-up time from sleep mode will be
approximately 60s to ensure that the BOD is working correctly before the MCU continues
executing code.
2. 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.
3. 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.
Table 6-9.
Crystal Oscillator Operating Modes
CKSEL[3:1]
Frequency Range (MHz)
Recommended C1 and C2 Value (pF)
100(1)
0.4 - 0.9
101
0.9 - 3.0
12 - 22
110
3.0 - 8.0
12 - 22
111
8.0 -
12 - 22
Table 6-10.
Start-up Times for the Crystal Oscillator Clock Selection
CKSEL0
SUT[1:0]
Start-up Time from
Power-down(1)
Additional Delay
from Reset
Recommended Usage
0
00
258 CK(2)
14CK + 4 ms
Ceramic resonator,
fast rising power
0
01
258 CK(2)
14CK + 64 ms
Ceramic resonator,
slowly rising power
010
1K CK(3)
14CK
Ceramic resonator,
BOD enabled
011
1K CK(3)
14CK + 4 ms
Ceramic resonator,
fast rising power
100
1K CK(3)
14CK + 64 ms
Ceramic resonator,
slowly rising power
1
01
16K CK
14CK
Crystal Oscillator,
BOD enabled
1
10
16K CK
14CK + 4 ms
Crystal Oscillator,
fast rising power
1
11
16K CK
14CK + 64 ms
Crystal Oscillator,
slowly rising power
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