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ADC34RF52 Datasheet(PDF) 45 Page - Texas Instruments |
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ADC34RF52 Datasheet(HTML) 45 Page - Texas Instruments |
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45 / 105 page  7.3.5.6.1 Fast frequency hopping using the GPIO1/2 pins The NCO frequency is selected as shown in Table 7-25. This mode is enabled with the following register writes: 1. Set 0x234 to 0x03 (NCO SEL MODE = 0, GPIO MODE = 3) *** selection common to all NCOs. there is option to only update single nco?? Table 7-25. NCO Frequency Selection using GPIO1/2 Pins # OF BANDS GPIO2 GPIO1 GPIO2 GPIO1 GPIO2 GPIO1 GPIO2 GPIO1 SINGLE 0 0 NCO1 CHB [1:0] 0 0 NCO1 CHA [1:0] 0 0 NCO1 CHD [1:0] 0 0 NCO1 CHC [1:0] DUAL NCO2 CHB [1:0] NCO1 CHB [1:0] NCO2 CHA [1:0] NCO1 CHA [1:0] NCO2 CHD [1:0] NCO1 CHD [1:0] NCO2 CHC [1:0] NCO1 CHC [1:0] 7.3.5.6.2 Fast frequency hopping using GPIO1/2, SEN and SDATA pins This mode is enabled by setting the SPISEL to logic high and using the following register writes: 1. NCO SEL MODE in address 0x234 needs to be set to 3 Table 7-26. NCO Frequency Selection SPI Interface Registers # OF BANDS SDATA SEN GPIO2 GPIO1 SDATA SEN GPIO2 GPIO1 SINGLE NCO1 CHB [2] 0 NCO1 CHB [1:0] NCO1 CHA [2] 0 NCO1 CHA [1:0] NCO1 CHD [2] 0 NCO1 CHD [1:0] NCO1 CHC [2] 0 NCO1 CHC [1:0] DUAL NCO2 CHB [1:0] NCO1 CHB [1:0] NCO2 CHA [1:0] NCO1 CHA [1:0] NCO2 CHD [1:0] NCO1 CHD [1:0] NCO2 CHC [1:0] NCO1 CHC [1:0] 7.3.5.6.3 Fast frequency hopping using the fast SPI In this mode the GPIO1/2 pins are used as a "fast SPI" input which only updates the NCO selection registers. No register address information needs to be sent. GPIO1 pin is SDATA and GPIO2 pin is SCLK. This mode is enabled by setting the SPISEL to logic high and using the following register writes: 1. Set 0x234 to 0x43 (NCO SEL MODE = 2, GPIO MODE = 3) The NCO frequencies are selected as shown in Table 7-27. Table 7-27. NCO Frequency Programming using FAST SPI # OF BANDS D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 SINGLE NCO1 CHD [2] 0 NCO1 CHD [1:0] NCO1 CHC [2] 0 NCO1 CHC [1:0] NCO1 CHB [2] 0 NCO1 CHB [1:0] NCO1 CHA [2] 0 NCO1 CHA [1:0] DUAL NCO2 CHD [1:0] NCO1 CHD [1:0] NCO2 CHC [1:0] NCO1 CHC [1:0] NCO2 CHB [1:0] NCO1 CHB [1:0] NCO2 CHA [1:0] NCO1 CHA [1:0] www.ti.com ADC34RF52 SBASAI7 – MARCH 2023 Copyright © 2023 Texas Instruments Incorporated Submit Document Feedback 45 Product Folder Links: ADC34RF52 |
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