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Re: Queries on AD9914 Parallel and Direct Mode

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Most of the registers have 32 bit data format. I am not getting how to write 32 bit data using the maximum available 16-bit data bus width in parallel mode in one WR cycle. For example what will be sequence of steps to write 0x00C00000 in CFR2?

 

This is what I interpreted from the timing diagram for Write

 

1. 16Bits / 8 Bits = 1

2. WR_b = 1          // Write bit = 1

3. D[15:8] = 0x01   // Place CFR2 Address

4. WR_b = 0          // Write bit = 0

5. D[31:16] = ???   // Need to write 32bit 0x00C00000 but bus width is 16- bits

6. WR_b = 1


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