Analog Devices EVAL-ADMV4640, User Manual

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User Guide EVAL-ADMV4640
ADMV4640 BLOCK DIAGRAM AND FUNCTIONS
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Table 1. ADMV4640 Block Diagram Label Functions (See Figure 7 )
Label Function
M Enter a value in the REF IN text box to set the reference frequency.
N1 Click the Doubler switch to set the DOUBLER_EN bit (Bit 3, Register 0x20E). When the Doubler switch is highlighted, the DOUBLER_EN bit is enabled. When
the Doubler switch is not highlighted, the DOUBLER_EN bit is disabled.
N2 Use the R Divider scroll to choose a value, or enter a value in the text box to change the R divider value (Bit[4:0], Register 0x20C).
N3 Click the Divide-by-2 switch to set the RDIV2_EN (Bit 0, Register 0x20E). When the Divide-by-2 switch is highlighted, the RDIV2_EN bit is enabled. When the
Divide-by-2 switch is not highlighted, the RDIV2_EN bit is disabled.
O Click the AMUX switch (represented by Label O) to set the SEL_AMUX bit (Bit[2:0], Register 0x301). There are two options for AMUX, AGPIO and temperature
sensor (PTAT).
P ADC blocks. Click Read from ADC to readback ADC values. See the ADMV4640 data sheet for further details.
Q Click Proceed to Memory Map to open the ADMV4640 memory map (see Figure 8 ).
R Click the AGPIO switch (represented by Label F) to set the SEL_AGPIO bit (Bit 3, Register 0x301). When the AGPIO switch is set to the right, the SEL_AGPIO
bit is disabled and the AGPIO pin is used as data output. When the AGPIO switch is set to the left, the SEL_AGPIO bit is enabled and the AGPIO pin is used
as external data input. See the ADMV4640 data sheet for further details.
Figure 8. ADMV4640 Memory Map in the ACE Software