73 7-channel PWM driver controlled via SPI bus

73 : 0b 001 001 001 : 7-channel PWM driver controlled via SPI bus

Select Project 1 2 3 4 5 6 7 8 9 ON SW2

How it works

uses a 8-bit counter to drive PWM on 7 output channels. Each channel is controlled by a dedicated 8-bit register that specifies its PWM level: 0 means always off, 1 is for 1/255 on, 5 is for 5/255 on and 255 is 255/255 (always on)

How to test

after reset, all output pins will be low. Use SPI writes with register addresses (0..6) to set 8-bit PWM levels. The corresponding pin will start oscillating between 0 and 1 according to the clock and the set level.

IO

# Input Output
0 clock out0
1 reset out1
2 cs out2
3 sclk out3
4 mosi out4
5 reserved out5
6 reserved out6
7 reserved miso