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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： | 4/13页 |
| 文件大小： | 528K |
| 代理商： | AT90S4434 |
AT90S/LS4434 and AT90S/LS8535
4
The Port B pins are tristated when a reset condition becomes active, even if the clock is not running.
Port C (PC7..PC0)
Port C is an 8-bit bi-directional I/O port with internal pullup resistors. The Port C output buffers can sink 20 mA. As inputs,
Port C pins that are externally pulled low will source current if the pull-up resistors are activated. Two Port C pins can alter-
natively be used as oscillator for Timer/Counter2.
The port C pins are tristated when a reset condition becomes active, even if the clock is not running.
Port D (PD7..PD0)
Port D is an 8-bit bidirectional I/O port with internal pull-up resistors. The Port D output buffers can sink 20 mA. As inputs,
Port D pins that are externally pulled low will source current if the pull-up resistors are activated.
Port D also serves the functions of various special features of the AT90S4434/8535 as listed on page 76.
The port D pins are tristated when a reset condition becomes active, even if the clock is not running.
RESET
Reset input. An external reset is generated by a low level on the RESET pin. Reset pulses longer than 50 ns will generate
a reset, even if the clock is not running. Shorter pulses are not guaranteed to generate a reset.
XTAL1
Input to the inverting oscillator amplifier and input to the internal clock operating circuit.
XTAL2
Output from the inverting oscillator amplifier
AVCC
This is the supply voltage pin for the A/D Converter. It should be externally connected to V
CC
via a low-pass filter. See
page 59 for details on operation of the ADC.
AREF
This is the analog reference input for the A/D Converter. For ADC operations, a voltage in the range AGND to AV
CC
must
be applied to this pin.
AGND
Analog ground. If the board has a separate analog ground plane, this pin should be connected to this ground plane. Other-
wise, connect to GND.
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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