Single Converter Mode - 2.6 English

When multi-tile synchronization (MTS) is not supported all the converters are independent. An NCO update state machine is instantiated for each converter. Before a NCO update can be performed the event source must be set to Tile. See Dynamic Update Events for more information on setting the event source.

The process for updating the NCO settings is shown below.

Figure 1. Single Converter NCO Update

1. Firstly the required frequency, phase, and phase reset values are set on the real-time NCO signal interface ports.
2. The update enable port is set to indicate which converter register values are to be updated.
3. A pulse is then sent to the update request port. If the IP state machine has completed the start up process the access to the requested NCO registers commences.
4. The busy signal remains High until the NCO update process is complete. The frequency, phase, and phase reset values should be held until the busy signal is deasserted.
   An estimate of the number of s_axi_aclk cycles taken to write the NCO values into the converter registers (T1) is given in the following tables for different values of nco_update_en.

   Table 1. NCO Update Times

   nco_update_en	RF-DAC / Quad RF-ADC	Dual RF-ADC
   000001	26	45
   000010	24	43
   000011	29	51
   000100	24	43
   000101	31	55
   000110	27	49
   000111	32	57
   001000	24	43
   001001	31	55
   001010	29	53
   001011	34	61
   001100	27	49
   001101	34	61
   001110	30	55
   001111	35	63
   010000	24	43
   010001	31	55
   010010	29	53
   010011	34	61
   010100	29	53
   010101	36	65
   010110	32	59
   010111	37	67
   011000	27	49
   011001	34	61
   011010	32	59
   011011	37	67
   011100	30	55
   011101	37	67
   011110	33	61
   011111	38	69
   100000	22	43
   100001	29	53
   100010	27	53
   100011	32	59
   100100	27	53
   100101	34	63
   100110	30	59
   100111	35	65
   101000	27	53
   101001	34	63
   101010	32	63
   101011	37	69
   101100	30	59
   101101	37	69
   101110	33	65
   101111	38	71
   110000	25	49
   110001	32	59
   110010	30	59
   110011	35	65
   110100	30	59
   110101	37	69
   110110	33	65
   110111	38	71
   111000	28	55
   111001	35	65
   111010	33	65
   111011	38	71
   111100	31	61
   111101	38	71
   111110	34	67
   111111	39	73