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关 键 词：51单片机自动下载电路
行 业：电子 电子产品设计
发布时间：2022-11-27
ATtiny88 Automotive 8-bit AVR Microcontroller with 8K Bytes In-System Programmable Flash DATASHEET Features High performance, low power AVR 8-Bit microcontroller Advanced RISC architecture 123 powerful instructions most single clock cycle e...
1.1Pin Descriptions1.1.1VCCDigital supply voltage.1.1.2AVCCAVCC is the supply voltage pin for the A/D converter and a selection of I/O pins. This pin shouldbe externally connected to VCC even if the ADC is not used. If the ADC is used, it is recom-mended this pin is connected to VCC through a low-pass filter, as described in “Analog NoiseCanceling Techniques” on page 172.The following pins receive their supply voltage from AVCC: PC7, PC[5:0] and (in 32-lead pack-ages) PA[1:0].
All other I/O pins take their supply voltage from VCC.1.1.3GNDGround.1.1.4Port A (PA3:0)Port A is a 4-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). ThePA[3:0] output buffers have symmetrical drive characteristics with both sink and source capabil-ity.
8-bit Microcontroller with 4/8K Bytes In-SystemProgrammable FlashATtiny48/88Rev. 8008H–AVR–04/11
As inputs, Port A pins that are externally pulled low will source current if the pull-up resistorsare activated. The Port A pins are tri-stated when a reset condition becomes active, even if theclock is not running.This port is available in 32-lead TQFP, 32-pad QFN and 32-ball UFBGA packages, only.1.1.5Port B (PB7:0)Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). ThePort B output buffers have symmetrical drive characteristics with both sink and source capability.As inputs, Port B pins that are externally pulled low will source current if the pull-up resistors areactivated.
The ATtiny48/88 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISCarchitecture. By executing powerful instructions in a single clock cycle, the ATtiny48/88 achievesthroughputs approaching 1 MIPS per MHz allowing the system designer to optimize power con-sumption versus processing speed.
