參數(shù)資料
型號: ATTINY43U-MU
廠商: Atmel
文件頁數(shù): 43/158頁
文件大?。?/td> 0K
描述: MCU AVR 4K FLASH 8MHZ 20-QFN
產(chǎn)品培訓模塊: ATtiny43U Overview
MCU Product Line Introduction
tinyAVR Introduction
標準包裝: 490
系列: AVR® ATtiny
核心處理器: AVR
芯體尺寸: 8-位
速度: 8MHz
連通性: USI
外圍設備: 欠壓檢測/復位,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 大小: 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-WFQFN 裸露焊盤
包裝: 托盤
產(chǎn)品目錄頁面: 613 (CN2011-ZH PDF)
配用: ATSTK600-TINYX3U-ND - STK600 SOCKET/ADAPTER TINYX3U
137
8048C–AVR–02/12
ATtiny43U
18.5
EEPROM Write Prevents Writing to SPMCSR
Note that an EEPROM write operation will block all software programming to Flash. Reading the
Fuses and Lock bits from software will also be prevented during the EEPROM write operation. It
is recommended that the user checks the status bit (EEPE) in the EECR Register and verifies
that the bit is cleared before writing to the SPMCSR Register.
18.6
Reading the Fuse and Lock Bits from Software
It is possible for firmware to read device fuse and lock bits. In addition, firmware can also read
data from the device signature imprint table (see page 143).
Note:
Fuse and Lock bits that are programmed, will be read as zero. Fuse and Lock bits that are unpro-
grammed, will be read as one.
18.6.1
Reading Lock Bits from Firmware
Lock bit values are returned in the destination register after an LPM instruction has been issued
within three CPU cycles after RFLB and SPMEN bits have been set in SPMCSR. The RFLB and
SPMEN bits automatically clear upon completion of reading the lock bits, or if no LPM instruction
is executed within three CPU cycles, or if no SPM instruction is executed within four CPU cycles.
When RFLB and SPMEN are cleared LPM functions normally.
To read the lock bits, follow the below procedure:
1.
Load the Z-pointer with 0x0001.
2.
Set RFLB and SPMEN bits in SPMCSR.
3.
Issue an LPM instruction within three clock cycles.
4.
Read the lock bits from the LPM destination register.
If successful, the contents of the destination register are as follows.
18.6.2
Reading Fuse Bits from Firmware
The algorithm for reading fuse bytes is similar to the one described above for reading lock bits,
only the addresses are different. To read the Fuse Low Byte (FLB), follow the below procedure:
1.
Load the Z-pointer with 0x0000.
2.
Set RFLB and SPMEN bits in SPMCSR.
3.
Issue an LPM instruction within three clock cycles.
4.
Read the FLB from the LPM destination register.
If successful, the contents of the destination register are as follows.
Refer to Table 19-5 on page 143 for a detailed description and mapping of the Fuse Low Byte.
Bit
7
654321
0
Rd
–––––
LB2
LB1
Bit
7
6
543
2
1
0
Rd
FLB7
FLB6
FLB5
FLB4
FLB3
FLB2
FLB1
FLB0
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ATTINY43U-MUR 功能描述:8位微控制器 -MCU 4KB FLSH 64B EE 256B SRAM-8MHz, IND 0.9V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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ATTINY44 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
ATTINY44-15MZ 功能描述:8位微控制器 -MCU 4KB Flash 15MHz Auto 125-degrees C RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT