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| 型號(hào)： | MQ80C52XXX-36/883 |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 36 MHz, MICROCONTROLLER, CQFP44 |
| 封裝： | CERAMIC, QFP-44 |
| 文件頁(yè)數(shù)： | 95/152頁(yè) |
| 文件大小： | 2528K |
| 代理商： | MQ80C52XXX-36/883 |
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299
8021G–AVR–03/11
ATmega329P/3290P
27.2.1
Latching of Fuses
The fuse values are latched when the device enters programming mode and changes of the
fuse values will have no effect until the part leaves Programming mode. This does not apply to
the EESAVE Fuse which will take effect once it is programmed. The fuses are also latched on
Power-up in Normal mode.
27.3
Signature Bytes
All Atmel microcontrollers have a three-byte signature code which identifies the device. This
code can be read in both serial and parallel mode, also when the device is locked. The three
bytes reside in a separate address space. For the ATmega329P/3290P the signature bytes are
given in Table 27-6.
27.4
Calibration Byte
The ATmega329P/3290P has a byte calibration value for the internal RC Oscillator. This byte
resides in the high byte of address 0x000 in the signature address space. During reset, this byte
is automatically written into the OSCCAL Register to ensure correct frequency of the calibrated
RC Oscillator.
27.5
Page Size
27.6
Parallel Programming Parameters, Pin Mapping, and Commands
This section describes how to parallel program and verify Flash Program memory, EEPROM
Data memory, Memory Lock bits, and Fuse bits in the ATmega329P/3290P. Pulses are
assumed to be at least 250ns unless otherwise noted.
Table 27-6.
Device and JTAG ID
Part
Signature Bytes
JTAG
0x000
0x001
0x002
Part Number
Manufacture ID
ATmega329P
0x1E
0x95
0x0B
950B
0x1F
ATmega3290P
0x1E
0x95
0x0C
950C
0x1F
Table 27-7.
No. of Words in a Page and No. of Pages in the Flash
Flash Size
Page Size
PCWORD
No. of Pages
PCPAGE
PCMSB
16K words
(32Kbytes)
64 words
PC[5:0]
256
PC[13:6]
13
Table 27-8.
No. of Words in a Page and No. of Pages in the EEPROM
EEPROM Size
Page Size
PCWORD
No. of Pages
PCPAGE
EEAMSB
1Kbytes
4bytes
EEA[1:0]
256
EEA[13:2]
13
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