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參數(shù)資料
| 型號： | M306V5EESP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PDIP64 |
| 封裝： | 0.750 INCH, PLASTIC, SDIP-64 |
| 文件頁數(shù)： | 98/152頁 |
| 文件大?。?/td> | 1963K |
| 代理商： | M306V5EESP |
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213
ATtiny25/45/85 [DATASHEET]
2586Q–AVR–08/2013
27.2.3
Rev B – C
PLL not locking
EEPROM read from application code does not work in Lock Bit Mode 3
EEPROM read may fail at low supply voltage / low clock frequency
Timer Counter 1 PWM output generation on OC1B- XOC1B does not work correctly
1.
PLL not locking
When at frequencies below 6.0 MHz, the PLL will not lock
Problem fix / Workaround
When using the PLL, run at 6.0 MHz or higher.
2.
EEPROM read from application code does not work in Lock Bit Mode 3
When the Memory Lock Bits LB2 and LB1 are programmed to mode 3, EEPROM read does not work from the
application code.
Problem Fix/Work around
Do not set Lock Bit Protection Mode 3 when the application code needs to read from EEPROM.
3.
EEPROM read may fail at low supply voltage / low clock frequency
Trying to read EEPROM at low clock frequencies and/or low supply voltage may result in invalid data.
Problem Fix/Workaround
Do not use the EEPROM when clock frequency is below 1MHz and supply voltage is below 2V. If operating fre-
quency can not be raised above 1MHz then supply voltage should be more than 2V. Similarly, if supply voltage
can not be raised above 2V then operating frequency should be more than 1MHz.
This feature is known to be temperature dependent but it has not been characterised. Guidelines are given for
room temperature, only.
4.
Timer Counter 1 PWM output generation on OC1B – XOC1B does not work correctly
Timer Counter1 PWM output OC1B-XOC1B does not work correctly. Only in the case when the control bits,
COM1B1 and COM1B0 are in the same mode as COM1A1 and COM1A0, respectively, the OC1B-XOC1B out-
put works correctly.
Problem Fix/Work around
The only workaround is to use same control setting on COM1A[1:0] and COM1B[1:0] control bits, see table 14-
4 in the data sheet. The problem has been fixed for Tiny45 rev D.
27.2.4
Rev A
Too high power down power consumption
DebugWIRE looses communication when single stepping into interrupts
PLL not locking
EEPROM read from application code does not work in Lock Bit Mode 3
EEPROM read may fail at low supply voltage / low clock frequency
1.
Too high power down power consumption
Three situations will lead to a too high power down power consumption. These are:
– An external clock is selected by fuses, but the I/O PORT is still enabled as an output.
– The EEPROM is read before entering power down.
– VCC is 4.5 volts or higher.
Problem fix / Workaround
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