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ATTINY24A-SSN 数据手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
8位微控制器
封装:
SOIC-14
描述:
8位 MCU微控制单元, AVR ATtiny Family ATtiny24 Series Microcontrollers, 20 MHz, 2 KB, 128 Byte, 14 引脚
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引脚图在P8P9P61P294Hot
典型应用电路图在P128
原理图在P10P13P59P74P76P77P78P91P93P95P97P99
型号编码规则在P276P277P278P294
封装信息在P279P280P281P283P284P285P286P287P288
功能描述在P123
应用领域在P38
电气规格在P156
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ATTINY24A-SSN数据手册
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ATtiny24A/44A/84A
2020 Microchip Technology Inc. Data Sheet Complete DS40002269A-page 9
1.1 Pin Descriptions
1.1.1 VCC
Supply voltage.
1.1.2 GND
Ground.
1.1.3 Port B (PB3:PB0)
Port B is a 4-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
Port B output buffers have symmetrical drive characteristics with both high sink and source
capability except PB3 which has the RESET
capability. To use pin PB3 as an I/O pin, instead of
RESET pin, program (‘0’) RSTDISBL fuse. As inputs, Port B pins that are externally pulled low
will source current if the pull-up resistors are activated. The Port B pins are tri-stated when a
reset condition becomes active, even if the clock is not running.
Port B also serves the functions of various special features of the ATtiny24A/44A/84A as listed
in Section 10.2 “Alternate Port Functions” on page 64.
1.1.4 RESET
Reset input. A low level on this pin for longer than the minimum pulse length will generate a
reset, even if the clock is not running and provided the reset pin has not been disabled. The min-
imum pulse length is given in Table 20-4 on page 182. Shorter pulses are not guaranteed to
generate a reset.
The reset pin can also be used as a (weak) I/O pin.
1.1.5 Port A (PA7:PA0)
Port A is a 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
Port A output buffers have symmetrical drive characteristics with both high sink and source
capability. As inputs, Port A pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port A pins are tri-stated when a reset condition becomes active,
even if the clock is not running.
Port A has alternate functions as analog inputs for the ADC, analog comparator, timer/counter,
SPI and pin change interrupt as described in “Alternate Port Functions” on page 64.
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