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參數(shù)資料
| 型號： | ATTINY2313 |
| 廠商： | Atmel Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| 中文描述： | 位AVR微控制器具有8K字節(jié)的系統(tǒng)內(nèi)可編程閃存 |
| 文件頁數(shù)： | 90/226頁 |
| 文件大?。?/td> | 3676K |
| 代理商： | ATTINY2313 |
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18
2543L–AVR–08/10
ATtiny2313
Bit 2 – EEMPE: EEPROM Master Program Enable
The EEMPE bit determines whether writing EEPE to one will have effect or not.
When EEMPE is set, setting EEPE within four clock cycles will program the EEPROM at the
selected address. If EEMPE is zero, setting EEPE will have no effect. When EEMPE has been
written to one by software, hardware clears the bit to zero after four clock cycles.
Bit 1 – EEPE: EEPROM Program Enable
The EEPROM Program Enable Signal EEPE is the programming enable signal to the EEPROM.
When EEPE is written, the EEPROM will be programmed according to the EEPMn bits setting.
The EEMPE bit must be written to one before a logical one is written to EEPE, otherwise no
EEPROM write takes place. When the write access time has elapsed, the EEPE bit is cleared by
hardware. When EEPE 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 cor-
rect address is set up in the EEAR Register, the EERE bit must be written to one to trigger the
EEPROM read. The EEPROM read access takes one instruction, and the requested data is
available immediately. When the EEPROM is read, the CPU is halted for four cycles before the
next instruction is executed. The user should poll the EEPE bit before starting the read opera-
tion. If a write operation is in progress, it is neither possible to read the EEPROM, nor to change
the EEAR Register.
Atomic Byte
Programming
Using Atomic Byte Programming is the simplest mode. When writing a byte to the EEPROM, the
user must write the address into the EEAR Register and data into EEDR Register. If the EEPMn
bits are zero, writing EEPE (within four cycles after EEMPE is written) will trigger the erase/write
operation. Both the erase and write cycle are done in one operation and the total programming
time is given in Table 1. The EEPE bit remains set until the erase and write operations are com-
pleted. While the device is busy with programming, it is not possible to do any other EEPROM
operations.
Split Byte
Programming
It is possible to split the erase and write cycle in two different operations. This may be useful if
the system requires short access time for some limited period of time (typically if the power sup-
ply voltage falls). In order to take advantage of this method, it is required that the locations to be
written have been erased before the write operation. But since the erase and write operations
are split, it is possible to do the erase operations when the system allows doing time-consuming
operations (typically after Power-up).
Erase
To erase a byte, the address must be written to EEAR. If the EEPMn bits are 0b01, writing the
EEPE (within four cycles after EEMPE is written) will trigger the erase operation only (program-
ming time is given in Table 1). The EEPE bit remains set until the erase operation completes.
While the device is busy programming, it is not possible to do any other EEPROM operations.
Write
To write a location, the user must write the address into EEAR and the data into EEDR. If the
EEPMn bits are 0b10, writing the EEPE (within four cycles after EEMPE is written) will trigger
the write operation only (programming time is given in Table 1). The EEPE bit remains set until
the write operation completes. If the location to be written has not been erased before write, the
data that is stored must be considered as lost. While the device is busy with programming, it is
not possible to do any other EEPROM operations.
The calibrated Oscillator is used to time the EEPROM accesses. Make sure the Oscillator fre-
quency is within the requirements described in “Oscillator Calibration Register – OSCCAL” on
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| AT93C56AU3-10UI-2.7 | 3-wire Serial EEPROMs 2K (256 x 8 or 128 x 16) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ATTINY2313_06 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 2K Bytes In-System Programmable Flash |
| ATTINY2313-16MI | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash |
| ATTINY2313-16MJ | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash |
| ATTINY2313-16PI | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash |
| ATTINY2313-16PJ | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash |
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