參數(shù)資料
型號(hào)： Tiny12
廠商： Atmel Corp.
英文描述： 8-bit AVR Microcontroller with 1K Byte Flash
中文描述： 8位AVR微控制器，帶有1K字節(jié)閃存
文件頁(yè)數(shù)： 39/91頁(yè)
文件大?。?/td> 1137K
代理商： TINY12
39
ATtiny11/12
1006D–AVR–07/03
Bit 2 - EEMWE: EEPROM Master Write Enable
The EEMWE bit determines whether setting EEWE to one causes the EEPROM to be
written. When EEMWE is set (one), setting EEWE will write data to the EEPROM at the
selected address. If EEMWE is zero, setting EEWE will have no effect. When EEMWE
has been set (one) by software, hardware clears the bit to zero after four clock cycles.
See the description of the EEWE bit for a EEPROM write procedure.
Bit 1 - EEWE: EEPROM Write Enable
The EEPROM Write Enable Signal EEWE is the write strobe to the EEPROM. When
address and data are correctly set up, the EEWE bit must be set to write the value into
the EEPROM. The EEMWE bit must be set when the logical one is written to EEWE,
otherwise no EEPROM write takes place. The following procedure should be followed
when writing the EEPROM (the order of steps 2 and 3 is unessential):
1.
Wait until EEWE becomes zero.
2.
Write new EEPROM address to EEAR (optional).
3.
Write new EEPROM data to EEDR (optional).
4.
Write a logical one to the EEMWE bit in EECR (to be able to write a logical one
to the EEMWE bit, the EEWE bit must be written to zero in the same cycle).
5.
Within four clock cycles after setting EEMWE, write a logical one to EEWE.
Caution: An interrupt between step 4 and step 5 will make the write cycle fail, since the
EEPROM Master Write Enable will time-out. If an interrupt routine accessing the
EEPROM is interrupting another EEPROM access, the EEAR or EEDR register will be
modified, causing the interrupted EEPROM access to fail. It is recommended to have
the global interrupt flag cleared during the four last steps to avoid these problems.
When the write access time has elapsed, the EEWE bit is cleared (zero) by hardware.
The user software can poll this bit and wait for a zero before writing the next byte. When
EEWE has been set, the CPU is halted for two cycles before the next instruction is
executed.
Bit 0 - EERE: EEPROM Read Enable
The EEPROM Read Enable Signal EERE is the read strobe to the EEPROM. When the
correct address is set up in the EEAR register, the EERE bit must be set. When the
EERE bit is cleared (zero) by hardware, requested data is found in the EEDR register.
The EEPROM read access takes one instruction and there is no need to poll the EERE
bit. When EERE has been set, the CPU is halted for four cycles before the next instruc-
tion is executed.
The user should poll the EEWE bit before starting the read operation. If a write operation
is in progress when new data or address is written to the EEPROM I/O registers, the
write operation will be interrupted, and the result is undefined.
The calibrated oscillator is used to time EEPROM. In Table 17 the typical programming
time is listed for EEPROM access from the CPU.
Table 17.
Typical EEPROM Programming Times
Parameter
Number of Calibrated
RC Oscillator Cycles
Min Programming
Time
Max Programming
Time
EEPROM write
(from CPU)
4096
3.1 ms
6.8 ms
相關(guān)PDF資料
PDF描述
TIP140 Complemetary Silicon Power Darlington Transistors(互補(bǔ)硅功率達(dá)林頓晶體管)
TIP142F TO-3P Fully Isolated Plastic Package Transistor CDIL
TIP145F TO-3P Fully Isolated Plastic Package Transistor CDIL
TIP140F TO-3P Fully Isolated Plastic Package Transistor CDIL
TIP141F TO-3P Fully Isolated Plastic Package Transistor CDIL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TINY88-15MZ 功能描述:8位微控制器 -MCU 8KB FLASH 12MHz AUTO RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT
TINY-BWA 制造商:HCC Embedded 功能描述:TINY FILE SYSTEM FOR BYTE WRITABLE ARRAYS - Virtual or Non-Physical Inventory (Software & Literature)
TINY-RAM 制造商:HCC Embedded 功能描述:TINY FILE SYSTEM FOR RAM - Virtual or Non-Physical Inventory (Software & Literature)
TIOL1113DMWT 功能描述:IO LINK 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類(lèi)型:收發(fā)器 協(xié)議:I/O 鏈路 驅(qū)動(dòng)器/接收器數(shù):1/1 雙工:- 接收器滯后:750mV 數(shù)據(jù)速率:250kbps 電壓 - 電源:7 V ~ 36 V 工作溫度:-40°C ~ 125°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤(pán) 供應(yīng)商器件封裝:10-VSON（3x2.5） 標(biāo)準(zhǔn)包裝:1
TIOL1115DMWT 功能描述:IO-LINK DEVICE TRANSCEIVERS WITH 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類(lèi)型:收發(fā)器 協(xié)議:I/O 鏈路 驅(qū)動(dòng)器/接收器數(shù):1/1 雙工:- 接收器滯后:750mV 數(shù)據(jù)速率:250kbps 電壓 - 電源:7 V ~ 36 V 工作溫度:-40°C ~ 125°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤(pán) 供應(yīng)商器件封裝:10-VSON（3x2.5） 標(biāo)準(zhǔn)包裝:1
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*