ATmega128 datasheet(289/386 Pages) ATMEL

tên linh kiện	ATmega128

Giải thích chi tiết về linh kiện	8-bit Microcontroller with 128K Bytes In-System Programmable Flash

PDF	386 Pages

Scroll/Zoom	100%

nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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289 / 386 page

289

2467S–AVR–07/09

ATmega128

the EESAVE fuse which will take effect once it is programmed. The fuses are also latched on

power-up in normal mode.

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 ATmega128 the signature bytes are:

$000: $1E (indicates manufactured by Atmel)

$001: $97 (indicates 128KB Flash memory)

$002: $02 (indicates ATmega128 device when $001 is $97)

Calibration Byte

The ATmega128 stores four different calibration values for the internal RC Oscillator. These

bytes resides in the signature row high byte of the addresses 0x000, 0x0001, 0x0002, and

0x0003 for 1, 2, 4, and 8 MHz respectively. During Reset, the 1 MHz value is automatically

loaded into the OSCCAL Register. If other frequencies are used, the calibration value has to be

loaded manually, see “Oscillator Calibration Register – OSCCAL” on page 42 for details.

ATmega128 bảng dữ liệu(PDF) 289 Page - ATMEL Corporation