Datasheet

AD9776/AD9778/AD9779
Rev. A | Page 27 of 56
SPI REGISTER MAP
Table 11.
Register
Name Address Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Def.
Comm 0x00 00 SDIO
Bidirectional
LSB/MSB First Software
Reset
Power-
Down
Mode
Auto
Power-
Down
Enable
PLL Lock
Indicator
(Read
Only)
0x00
0x01 01 Filter Interpolation Factor<1:0> Filter Modulation Mode<3:0> Zero
Stuffing
Enable
0x00
Digital
Control
0x02 02 Data Format Dual/Interleaved
Data Bus Mode
Real Mode Data
Clock
Delay
Enable
Inverse
Sinc
Enable
DATACLK
Invert
TxEnable
Invert
Q First 0x00
Sync
Control
0x03 03 Data Clock Delay Mode<1:0> Data Clock Divide
Ratio<1:0>
Reserved 0x00
0x04 04 Data Clock Delay<3:0> Output Sync Pulse Divide<2:0> Sync Out
Delay<4>
0x00
0x05 05 Sync Out Delay<3:0> Input Sync Pulse Frequency Ratio<2:0> Sync Input
Delay<4>
0x00
0x06 06 Sync Input Delay<3:0> Input Sync Pulse Timing Error Tolerance<3:0> 0x00
0x07 07 Sync
Receiver
Enable
Sync Driver
Enable
Sync
Triggering
Edge
DAC Clock Offset<4:0> 0x00
PLL
Control
0x08 08 PLL Band Select<5:0> PLL VCO AGC
Gain<1:0>
0xCF
0x09 09 PLL Enable PLL VCO Divider Ratio<1:0> PLL Loop
Divide
Ratio<1:0>
PLL Bias Setting<2:0> 0x37
Misc
Control
0x0A 10 PLL Control Voltage Range<2:0> (Read Only) PLL Loop Bandwidth Adjustment<4:0> 0x38
0x0B 11 I DAC Gain Adjustment<7:0> 0xF9 I DAC
Control
Register
0x0C 12 I DAC Sleep I DAC Power
Down
I DAC Gain
Adjustment<9:8>
0x01
0x0D 13 Auxiliary DAC1 Data<7:0> 0x00 Aux DAC1
Control
Register
0x0E 14 Auxiliary
DAC1 Sign
Auxiliary DAC1
Current Direction
Auxiliary
DAC1
Power-
Down
Auxiliary DAC1
Data<9:8>
0x00
0x0F 15 Q DAC Gain Adjustment<7:0> 0xF9 Q DAC
Control
Register
0x10 16 Q DAC Sleep Q DAC Power-
Down
Q DAC Gain
Adjustment<9:8>
0x01
0x11 17 Auxiliary DAC2 Data<7:0> 0x00
0x12 18 Auxiliary
DAC2 Sign
Auxiliary DAC2
Current Direction
Auxiliary
DAC2
Power-
Down
Auxiliary DAC2
Data<9:8>
0x00
Aux DAC2
Control
Register
0x13
to
0x18
19 to 24 Reserved
0x19 25 Sync Delay IRQ Sync
Delay
IRQ
Enable
Internal
Sync
Loopback
0x00
Interrupt
Register
0x1A
to
0x1F
26 to 31 Reserved