Data Sheet
AD5940
WAVEFORM GENERATOR REGISTERS
Table 113. Waveform Generator for High Speed DAC Registers Summary
Address
Name
Description
Reset
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0x00002014
0x00002018
0x0000201C
0x00002020
0x00002024
0x00002028
0x0000202C
0x00002030
0x00002034
0x00002038
0x0000203C
WGCON
Waveform generator configuration register.
0x00000030
0x00000000
0x00000000
0x00000000
0x00000000
0x00000000
0x00000000
0x00000000
0x00000000
0x00000000
0x00000000
WGDCLEVEL1
WGDCLEVEL2
WGDELAY1
WGSLOPE1
WGDELAY2
WGSLOPE2
WGFCW
WGPHASE
WGOFFSET
WGAMPLITUDE
Waveform generator register, Trapezoid DC Level 1.
Waveform generator register, Trapezoid DC Level 2.
Waveform generator register ,Trapezoid Delay 1 time.
Waveform generator register, Trapezoid Slope 1 time.
Waveform generator register, Trapezoid Delay 2 time.
Waveform generator register, Trapezoid Slope 2 time.
Waveform generator register, sinusoid frequency control word.
Waveform generator register, sinusoid phase offset.
Waveform generator register, sinusoid offset.
Waveform generator register, sinusoid amplitude.
Waveform Generator Configuration Register—WGCON
Address 0x00002014, Reset: 0x00000030, Name: WGCON
Table 114. Bit Descriptions for WGCON Register
Bits
Bit Name
Settings Description
Reset Access
[31:6] Reserved
Reserved
0x0
0x1
R
5
4
DACGAINCAL
Bypass DAC gain. Use the DAC gain calculated during the Analog Devices
factory trim and stored in the DACGAIN register.
Bypass DAC gain correction.
Perform DAC gain correction.
R/W
0
1
DACOFFSETCAL
Bypass DAC Offset. Use the DAC offset calculated during the calibration routine.
Bypass DAC offset correction.
Perform DAC offset correction. The offset value is in the DACOFFSET register and
the DACOFFSETHS register for low power and high power mode, respectively,
when LPDACCON0, Bit 0 = 0. The offset value is in the DACOFFSETATTEN register
and the DACOFFSETATTENHS register for low power and high power mode,
respectively, when LPDACCON0, Bit 0 = 1.
0x1
R/W
0
1
3
[2:1]
Reserved
TYPESEL
Reserved.
0x0
0x0
R
R/W
These bits select the type of waveform.
00 Direct write to the DAC. User code writes to the HSDACDAT register directly.
10 Sinusoid. Sets the WAVEGENEN bit in the AFECON register to 1. The DAC outputs
a sine wave.
11 Trapezoid. Sets the WAVEGENEN bit in the AFECON register to 1. The DAC
outputs a trapezoid wave.
0
TRAPRSTEN
Resets the trapezoid waveform generator. The output restarts from the beginning of
the Delay 1 period, with an output corresponding to DC Level 1. The reset takes
effect immediately. After the trapezoid generator is reset, the bit value returns to 0.
0x0
W
0
1
Disable reset of the trapezoid waveform generator.
Enable reset of the trapezoid waveform generator.
Waveform Generator, Trapezoid DC Level 1 Register—WGDCLEVEL1
Address 0x00002018, Reset: 0x00000000, Name: WGDCLEVEL1
Table 115. Bit Descriptions for WGDCLEVEL1 Register
Bits
[31:12]
[11:0]
Bit Name
Reserved
TRAPDCLEVEL1
Settings
Description
Reserved.
Reset
0x0
0x0
Access
R
R/W
DC Level 1 value for trapezoid waveform generation.
Rev. 0 | Page 93 of 130
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