ubx160_cpld HDL Worker

Ettus x310 UBX160 daughter board IO worker.

Detail

This worker provides control of the CPLD device located on the UBX160 daughter card. An instance of this worker is required for each daughter board present in the x310.

The CPLD is controlled using an SPI interface. This SPI interface is provided by the ubx160_io.hdl worker that supports this ubx160_cpld.hdl worker.

The ubx160 CPLD is configured by the drc_x310.rcc digital-Radio-Control. The application does not have to configure the CPLD using this worker.

The CPLD has a single 32-bit register. This register is accessed through the worker’s property (name: cpld_reg). This property is write only.

The bits of this register have the following functionality.

Bit	Name	Usage
0	TXHB_SEL	Set to ‘1’ to select direct conversion path
1	TXLB_SEL	Set to ‘1’ to select down conversion path
2	TXLO1_FSEL1	TXLO1 Filter Select Set bit to ‘1’ to enable filter FSEL1 Fc=0.8GHz FSEL2 Fc=2.2GHz FSEL3 Fc=no filter
3	TXLO1_FSEL2
4	TXLO1_FSEL3
5	RXHB_SEL	Set to ‘1’ to select direct conversion path
6	RXLB_SEL	Set to ‘1’ to select down conversion path
7	RXLO1_FSEL1	RXLO1 Filter Select Set bit to ‘1’ to enable filter FSEL1 Fc=0.8GHz FSEL2 Fc=2.2GHz FSEL3 Fc=no filter
8	RXLO1_FSEL2
9	RXLO1_FSEL3
10	SEL_LNA1	Set to ‘1’ to select unfiltered LNA
11	SEL_LNA2	Set to ‘1’ to select filtered LNA
12	TXLO1_FORCEON	Hardware FORCE ON
13	TXLO2_FORCEON	Hardware FORCE ON
14	TXMOD_FORCEON	Hardware FORCE ON
15	TXMIXER_FORCEON	Hardware FORCE ON
16	TXDRV_FORCEON	Hardware FORCE ON
17	RXLO1_FORCEON	Hardware FORCE ON
18	RXLO2_FORCEON	Hardware FORCE ON
19	RXDEMOD_FORCEON	Hardware FORCE ON
20	RXMIXER_FORCEON	Hardware FORCE ON
21	RXDRV_FORCEON	Hardware FORCE ON
22	RXAMP_FORCEON	Hardware FORCE ON
23	RXLNA1_FORCEON	Hardware FORCE ON
24	RXLNA2_FORCEON	Hardware FORCE ON
25	CAL_ENABLE	Used to set calibration (loopback) path

FORCE ON signals are used when operating in performance power mode as a means to reduce the settling time by powering on the hardware before it is used.

Worker Properties

• cpld_reg

  • Type: ulong

  • Access:

    • Parameter: False

    • Writable: True

    • Initial: False

    • Volatile: True

    • Read back: False

  • Default value: None

Worker Ports

Interfaces:

• rawprops

Utilization

Utilization reporting is not currently implemented.