Datasheet

AD9148 Data Sheet
Rev. B | Page 38 of 72
Register Name
Addr
(Hex) Bit Name Function Default
SED Control/Status 40 7 SED compare enable Enables the SED circuitry. 0
6
Port B error
detected
Status of last compare on Port B. 0
5
Port A error
detected
Status of last compare on Port A. 0
3 Auto-clear enable Enables the auto reset after eight valid sample sets. 0
2
Port B compare
failed
Fail status determined for last sample set on Port B. 0
1
Port A compare
failed
Fail status determined for last sample set on Port A. 0
0 Compare passed Pass status determined for last sample set. 0
SED_R_L 41 7:0
SED Status Rising
Edge Samples[7:0]
SED Status Rising Edge Samples[15:0] indicate which bits
were received in error.
Read-
only
Set DAC SPI select = 0 to read back errors on Port A.
Set DAC SPI select = 1 to read back errors on Port B.
SED_R_H 42 7:0
SED Status Rising
Edge Samples[15:8]
SED Status Rising Edge Samples[15:0] indicate which bits
were received in error.
Read-
only
Set DAC SPI select = 0 to read back errors on Port A.
Set DAC SPI select = 1 to read back errors on Port B.
SED_F_L 43 7:0
SED Status Falling
Edge Samples[7:0]
SED Status Falling Edge Samples[15:0] indicate which bits
were received in error.
Read-
only
Set DAC SPI select = 0 to read back errors on Port A.
Set DAC SPI select = 1 to read back errors on Port B.
SED_F_H 44 7:0
SED Status Falling
Edge Samples[15:8]
SED Status Falling Edge Samples[15:0] indicate which bits
were received in error.
Read-
only
Set DAC SPI select = 0 to read back errors on Port A.
Set DAC SPI select = 1 to read back errors on Port B.
I Gain Control 50 7:0 IGain
IGain[7:0] is a value that directly scales the samples written to
the IDAC. The bit weighting is MSB = 2
1
and LSB = 2
−6
, which
yields a multiplier range of 0 to 3.984375.
40
Set DAC SPI select = 0 to configure DAC 1 path.
Set DAC SPI select = 1 to configure DAC 3 path.
Q Gain Control 51 7:0 QGain
QGain[7:0] is a value that directly scales the samples written
to the QDAC. The bit weighting is MSB = 2
1
and LSB = 2
−6
,
which yields a multiplier range of 0 to 3.984375.
40
Set DAC SPI select = 0 to configure DAC 2 path.
Set DAC SPI select = 1 to configure DAC 4 path.