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Revision 1.00

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AS1122

Datasheet - D e t a i l e d D e s c r i p t i o n

PWM Data

To set the PWM, 12 bit (4096 steps) per Output channel can be used. After sending the 8 bit identifier for access to the PWM Data register the

device is waiting for 144 bits to receive. If more or less bits are send the whole dataword will be ignored.

Figure 27. PWM Input Timing Diagram

For n devices in a chain only one identifier needs to be send to set all n devices to the same register setting.

Figure 28. PWM Data for n-devices

Command Data

The AS1122 offers a command register for setting the configuration of the device. The command register is again accessible via an identifier and

is 8 bits long. If more or less bits are send the whole dataword will be ignored.

Figure 29. Command Input Timing Diagram