The interrupt has an open-drain output, which means you need a pull-up on your microcontroller to detect when the PCF8574 drives it LOW. When setting a pin HIGH, it acts as both output AND input. The pin internally uses a weak current-source pull-up to latch output HIGH. When driven...
输出类型 Open Drain 系列 TCA6408A-Q1 工作电源电流 9 uA 电源电压-最大 3.6 V 电源电压-最小 1.65 V 单位重量 173 mg 可售卖地 全国 型号 TCA6408AQPWRQ1 代理各品牌集成电路IC 货源稳定 长期供应 提供电子元器件一站式采购 PDF资料 接口及驱动芯片-I/O端口扩展器-TCA6408AQPWRQ1-TI-...
3.5μA (Max. 5.5V) ⚫ 5.5V Tolerance I/O Port ⚫ Remote 16-bit GPIO Expander ⚫ Compatible with SMBus and I2C interface ⚫ I2C Speed up to 1.0MHz (Fast-mode Plus) ⚫ Up to 8 slave addresses ⚫ Open-drain Interrupt output with active low to indicate input state changed. ...
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The PCA9538 open-drain interrupt output (INT) is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system controller that an input state has changed. The power-on reset sets the registers to their default values and initialize...
-Low standby current consumption: −3.0μA(typical at 5 V VCC) −1.5μA(typical at 3.3 V VCC) -400 kHz Fast-mode I2C-bus -5 V tolerant I/Os -Open-drain active LOW interrupt output(INT) -Configurable Slave Address with 3 Address Pins ...
gpio_output_en |= (1UL << 21); // internal control, no external driving source connected Enable the interrupt as you’ve done, and which I do in this order:mtvec,PLIC_PRIORITY(0=off, 1=lowest, 7=highest; written to 0x0C000000 + 4 * source_id),PLIC_ENABLE(set bit source_id ...
PI4IOE5V6416A has open-drain interrupt (INT) output pin that goes LOW when in the input state of a GPIO-port changes from the input-state default register value. The device also has an interrupt masking feature by which the user can mask the interrupt from an individual GPIO-port. ...
(c) converting the active low input interrupt signal into an active high, active low, open drain, totem pole, or tristate output interrupt signal at an output in accordance with the plurality of control signals; wherein steps (a), (b), and (c) are performed with a circuit comprising: ...
(RESET) Input • Open-Drain Active-Low Interrupt (INT) Output • 400-kHz Fast I2C Bus • Input/Output Configuration Register • Polarity Inversion Register • Internal Power-On Reset • Power Up With All Channels Configured as Inputs • No Glitch On Power Up • Noise Filter on...