In SX Microcontrollers, SX/B Compiler and SX-Key Tool, g_daubach wrote:

Kevin,

I used the SX48's because I needed "tons" of I/O lines. As a matter of fact, one SX48 is doing nothing else but generating 18 different PWM outputs. Data exchange between both SX48's is done via a parallel interface (8 bit data, 4 bit address, 1 bit strobe). Three more port B inputs are used to trigger interrupts to control the PWM modes.

The other SX48 handles various timing tasks, controls the other SX48 via the parallel interface, and the interrupt lines. It also handles serial communication with a PC.

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