Chapter 3 introduced the importance of the I/O subsystem, and Figure 3.2 showed that a program is either executing, performing an I/O operation, or waiting. A time-sharing system gives each user the ...
The I 2 C, bus controlled push-pull general-purpose input/output feature PCA 9538/9539 I/O expanders, integrating push-pull outputs, interrupt, and hardware reset. The 4-, 8-, and 16-bit devices have ...
San Jose, Calif. — Royal Philips Electronics introduced a series of I²C-bus controlled push-pull general-purpose input/outputs (GPIOs) that tout reduced power consumption for portable applications, as ...
A computer cannot meet its requirements unless it communicates with its external devices. An interrupt is a communication gateway between the device and a processor. The allocation of an interrupt ...
The 8051-compatible microcontrollers are equipped with up to two inputs that may be used as general-purpose interrupts. A simple way to increase the number of interrupt inputs is shown in the figure.
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