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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 38/91頁 |
| 文件大?。?/td> | 1137K |
| 代理商： | TINY12 |
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38
ATtiny11/12
1006D–AVR–07/03
ATtiny12 EEPROM
Read/Write Access
The EEPROM access registers are accessible in the I/O space.
The write access time is in the range of 3.1 - 6.8 ms, depending on the frequency of the
calibrated RC oscillator. See Table 17 for details. A self-timing function lets the user
software detect when the next byte can be written. A special EEPROM Ready interrupt
can be set to trigger when the EEPROM is ready to accept new data. The minimum volt-
age for writing to the EEPROM is 2.2V.
In order to prevent unintentional EEPROM writes, a two-state write procedure must be
followed. Refer to the description of the EEPROM Control Register for details on this.
When the EEPROM is written, the CPU is halted for two clock cycles before the next
instruction is executed. When the EEPROM is read, the CPU is halted for four clock
cycles before the next instruction is executed.
EEPROM Address Register –
EEAR
The EEPROM Address Register – EEAR specifies the EEPROM address in the 64-byte
EEPROM space. The EEPROM data bytes are addressed linearly between 0 and 63.
During reset, the EEAR register is not cleared. Instead, the data in the register is kept.
EEPROM Data Register –
EEDR
Bits 7..0 - EEDR7.0: EEPROM Data
For the EEPROM write operation, the EEDR register contains the data to be written to
the EEPROM in the address given by the EEAR register. For the EEPROM read opera-
tion, the EEDR contains the data read out from the EEPROM at the address given by
EEAR.
EEPROM Control Register –
EECR
Bit 7..4 - Res: Reserved Bits
These bits are reserved bits in the ATtiny12 and will always read as zero.
Bit 3 - EERIE: EEPROM Ready Interrupt Enable
When the I-bit in SREG and EERIE are set (one), the EEPROM Ready interrupt is
enabled. When cleared (zero), the interrupt is disabled. The EEPROM Ready interrupt
generates a constant interrupt when EEWE is cleared (zero).
Bit
7
6
5
4
3
2
1
0
$1E
-
-
EEAR5
EEAR4
EEAR3
EEAR2
EEAR1
EEAR0
EEAR
Read/Write
R
R
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
X
X
X
X
X
X
Bit
7
6
5
4
3
2
1
0
$1D
MSB
LSB
EEDR
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
$1C
-
-
-
-
EERIE
EEMWE
EEWE
EERE
EECR
Read/Write
R
R
R
R
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
X
0
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| 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 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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