參數(shù)資料
型號: ATTINY43U-SU
廠商: Atmel
文件頁數(shù): 78/158頁
文件大?。?/td> 0K
描述: MCU AVR 4K FLASH 8MHZ 20-SOIC
產(chǎn)品培訓(xùn)模塊: ATtiny43U Overview
MCU Product Line Introduction
tinyAVR Introduction
標(biāo)準(zhǔn)包裝: 37
系列: AVR® ATtiny
核心處理器: AVR
芯體尺寸: 8-位
速度: 8MHz
連通性: USI
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,溫度傳感器,WDT
輸入/輸出數(shù): 16
程序存儲器容量: 4KB(2K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 64 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 4x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 20-SOIC(0.295",7.50mm 寬)
包裝: 管件
產(chǎn)品目錄頁面: 613 (CN2011-ZH PDF)
配用: ATSTK600-TINYX3U-ND - STK600 SOCKET/ADAPTER TINYX3U
26
8048C–AVR–02/12
ATtiny43U
When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in
Note:
1. If the RSTDISBL fuse is programmed, this start-up time will be increased to
14CK + 4 ms to ensure programming mode can be entered.
2.
The device is shipped with this option selected.
6.2.3
Internal 128 kHz Oscillator
The 128 kHz internal oscillator is a low power oscillator providing a clock of 128 kHz. The fre-
quency is nominal at 3V and 25
°C. This clock may be select as the system clock by
programming the CKSEL Fuses to “11” as shown in Table 6-6 below.
When this clock source is selected, start-up times are determined by the SUT Fuses as shown in
Note:
1. If the RSTDISBL fuse is programmed, this start-up time will be increased to 14CK + 4 ms to
ensure programming mode can be entered.
6.2.4
Default Clock Source
The device is shipped with CKSEL = "0010", SUT = "10", and CKDIV8 programmed. The default
clock source is therefore the internal RC oscillator running at 8.0 MHz with the longest start-up
time and an initial system clock prescale setting of 8, resulting in a 1 MHz system clock. The
default setting ensures every user can make the desired clock source setting using any available
programming interface.
6.2.5
Clock Startup Sequence
Any clock source needs a sufficient V
CC to start oscillating and a minimum number of oscillating
cycles before it can be considered stable.
Table 6-5.
Start-up times for Internal Calibrated RC Oscillator Clock Selection
SUT[1:0]
Start-up Time
from Power-down
Additional Delay from
Reset (V
CC = 5.0V)
Recommended Usage
00
6 CK
BOD enabled
01
6 CK
14CK + 4 ms
Fast rising power
6 CK
14CK + 64 ms
Slowly rising power
11
Reserved
Table 6-6.
128 kHz Internal Oscillator Operating Modes
CKSEL[3:0]
Nominal Frequency
0011
128 kHz
Table 6-7.
Start-up Times for the 128 kHz Internal Oscillator
SUT[1:0]
Start-up Time
from Power-down
Additional Delay
from Reset
Recommended Usage
00
6 CK
BOD enabled
01
6 CK
14CK + 4 ms
Fast rising power
10
6 CK
14CK + 64 ms
Slowly rising power
11
Reserved
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