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参数资料
| 型号： | AT90S4434 |
| 厂商： | Atmel Corp. |
| 元件分类： | 8位微控制器 |
| 英文描述： | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| 中文描述： | 位AVR微控制器具有8K字节的系统内可编程闪存 |
| 文件页数： | 3/13页 |
| 文件大小： | 528K |
| 代理商： | AT90S4434 |
AT90S/LS4434 and AT90S/LS8535
3
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 AT90S4434/8535 provides the following features: 4K/8K bytes of In-System Programmable Flash, 256/512 bytes
EEPROM, 256/512 bytes SRAM, 32 general purpose I/O lines, 32 general purpose working registers, Real Time Clock
(RTC), three flexible timer/counters with compare modes, internal and external interrupts, a programmable serial UART, 8-
channel, 10-bit ADC, programmable Watchdog Timer with internal oscillator, an SPI serial port, and three software select-
able 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 hardware reset. In Power Save mode, the timer oscillator continues to run,
allowing the user to maintain a timer base while the rest of the device is sleeping.
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 or by a conventional nonvolatile memory
programmer. By combining an 8-bit RISC CPU with In-System Programmable Flash on a monolithic chip, the Atmel
AT90S4434/8535 is a powerful microcontroller that provides a highly flexible and cost effective solution to many embedded
control applications.
The AT90S4434/8535 AVR is supported with a full suite of program and system development tools including: C compilers,
macro assemblers, program debugger/simulators, in-circuit emulators, and evaluation kits.
Comparison between AT90S4434 and AT90S8535
The AT90S4434 has 4K bytes of In-System Programmable Flash, 256 bytes of EEPROM, and 256 bytes of internal SRAM.
The AT90S8535 has 8K bytes of In-System Programmable Flash, 512 bytes of EEPROM, and 512 bytes of internal SRAM.
Table 1 summarizes the different memory sizes for the two devices.
Pin Descriptions
VCC
Digital supply voltage
GND
Digital ground
Port A (PA7..PA0)
Port A is an 8-bit bi-directional I/O port. Port pins can provide internal pull-up resistors (selected for each bit). The Port A
output buffers can sink 20mA and can drive LED displays directly. When pins PA0 to PA7 are used as inputs and are exter-
nally pulled low, they will source current if the internal pull-up resistors are activated.
Port A also serves as the analog inputs to the A/D Converter.
The Port A pins are tristated when a reset condition becomes active, even if the clock is not running.
Port B (PB7..PB0)
Port B is an 8-bit bi-directional I/O port with internal pull-up resistors. The Port B output buffers can sink 20 mA. As inputs,
Port B pins that are externally pulled low will source current if the pull-up resistors are activated. Port B also serves the
functions of various special features of the AT90S4434/8535 as listed on page 68.
Table 1.
Memory Size Summary
Part
Flash
EEPROM
SRAM
AT90S4434
4K bytes
256 bytes
256 bytes
AT90S8535
8K bytes
512 bytes
512 bytes
相关PDF资料 |
PDF描述 |
|---|---|
| AT90LS8535-4MC | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90LS8535 | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90LS8535-4AC | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90LS8535-4AI | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90LS8535-4JC | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT90S4434-8AC | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-Bit Microcontroller with 4K/8K Bytes In-System Programmable Flash |
| AT90S4434-8AI | 制造商:Atmel Corporation 功能描述:MicroController, 8-Bit, 44 Pin, Plastic, TQFP |
| AT90S4434-8JC | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-Bit Microcontroller with 4K/8K Bytes In-System Programmable Flash |
| AT90S4434-8JI | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-Bit Microcontroller with 4K/8K Bytes In-System Programmable Flash |
| AT90S4434-8PC | 制造商:Atmel Corporation 功能描述: 制造商:Atmel Corporation 功能描述:MicroController, 8-Bit, 40 Pin, Plastic, DIP |
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