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| 型號： | S80C52TXXX-30:RD |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 30 MHz, MICROCONTROLLER, PQCC44 |
| 文件頁數(shù)： | 192/257頁 |
| 文件大?。?/td> | 1840K |
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4
ATmega8515(L)
2512K–AVR–01/10
The AVR core combines a rich instruction set with 32 general purpose working registers.
All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing
two independent registers to be accessed in one single instruction executed in one clock
cycle. The resulting architecture is more code efficient while achieving throughputs up to
ten times faster than conventional CISC microcontrollers.
The ATmega8515 provides the following features: 8K bytes of In-System Programmable
Flash with Read-While-Write capabilities, 512 bytes EEPROM, 512 bytes SRAM, an
External memory interface, 35 general purpose I/O lines, 32 general purpose working
registers, two flexible Timer/Counters with compare modes, Internal and External inter-
rupts, a Serial Programmable USART, a programmable Watchdog Timer with internal
Oscillator, a SPI serial port, and three software selectable power saving modes. The Idle
mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and Interrupt
system to continue functioning. The Power-down mode saves the Register contents but
freezes the Oscillator, disabling all other chip functions until the next interrupt or hard-
ware reset. In Standby mode, the crystal/resonator Oscillator is running while the rest of
the device is sleeping. This allows very fast start-up combined with low-power
consumption.
The device is manufactured using Atmel’s high density nonvolatile memory technology.
The On-chip ISP Flash allows the Program memory to be reprogrammed In-System
through an SPI serial interface, by a conventional nonvolatile memory programmer, or
by an On-chip Boot program running on the AVR core. The boot program can use any
interface to download the application program in the Application Flash memory. Soft-
ware in the Boot Flash section will continue to run while the Application Flash section is
updated, providing true Read-While-Write operation. By combining an 8-bit RISC CPU
with In-System Self-programmable Flash on a monolithic chip, the Atmel ATmega8515
is a powerful microcontroller that provides a highly flexible and cost effective solution to
many embedded control applications.
The ATmega8515 is supported with a full suite of program and system development
tools including: C Compilers, Macro assemblers, Program debugger/simulators, In-cir-
cuit Emulators, and Evaluation kits.
Disclaimer
Typical values contained in this datasheet are based on simulations and characteriza-
tion of other AVR microcontrollers manufactured on the same process technology. Min
and Max values will be available after the device is characterized.
AT90S4414/8515 and
ATmega8515
Compatibility
The ATmega8515 provides all the features of the AT90S4414/8515. In addition, several
new feature s are ad ded. The ATm ega8 515 is backward com patib le wit h
AT90S4414/8515 in most cases. However, some incompatibilities between the two
microcontrollers exist. To solve this problem, an AT90S4414/8515 compatibility mode
can be selected by programming the S8515C Fuse. ATmega8515 is 100% pin compati-
ble with AT90S4414/8515, and can replace the AT90S4414/8515 on current printed
circuit boards. However, the location of Fuse bits and the electrical characteristics dif-
fers between the two devices.
AT90S4414/8515 Compatibility
Mode
Programming the S8515C Fuse will change the following functionality:
The timed sequence for changing the Watchdog Time-out period is disabled. See
53 for details.
The double buffering of the USART Receive Registers is disabled. See “AVR
USART vs. AVR UART – Compatibility” on page 137 for details.
PORTE(2:1) will be set as output, and PORTE0 will be set as input.
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