Datasheet

AD9253 Data Sheet
Rev. 0 | Page 36 of 40
ADDR
(Hex) Parameter Name
Bit 7
(MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Bit 0
(LSB)
Default
Value
(Hex) Comments
0x18 V
REF
Open Open Open Open Open Internal V
REF
adjustment
digital scheme[2:0]
000 = 1.0 V p-p
001 = 1.14 V p-p
010 = 1.33 V p-p
011 = 1.6 V p-p
100 = 2.0 V p-p
0x04 Selects and/or
adjusts the
V
REF
.
0x19 USER_PATT1_LSB
(global)
B7 B6 B5 B4 B3 B2 B1 B0 0x00 User Defined
Pattern 1 LSB.
0x1A USER_PATT1_MSB
(global)
B15 B14 B13 B12 B11 B10 B9 B8 0x00 User Defined
Pattern 1 MSB.
0x1B USER_PATT2_LSB
(global)
B7 B6 B5 B4 B3 B2 B1 B0 0x00 User Defined
Pattern 2 LSB.
0x1C USER_PATT2_MSB
(global)
B15 B14 B13 B12 B11 B10 B9 B8 0x00 User Defined
Pattern 2 MSB.
0x21 Serial output data
control (global)
LVDS
output
LSB
first
SDR/DDR one-lane/two-lane,
bitwise/bytewise[6:4]
000 = SDR two-lane, bitwise
001 = SDR two-lane, bytewise
010 = DDR two-lane, bitwise
011 = DDR two-lane, bytewise
100 = DDR one-lane
Open Select
2×
frame
Serial output
number of bits
00 = 16 bits
10 = 12 bits
0x30 Serial stream
control.
Default causes
MSB first and
the native bit
stream.
0x22 Serial channel
status (local)
Open Open Open Open Open Open Channel
output
reset
Channel
power-
down
0x00 Used to power
down
individual
sections of a
converter.
0x100 Resolution/
sample rate
override
Open Resolution/
sample rate
override
enable
Resolution
01 = 14 bits
10 = 12 bits
Open Sample rate
000 = 20 MSPS
001 = 40 MSPS
010 = 50 MSPS
011 = 65 MSPS
100 = 80 MSPS
101 = 105 MSPS
110 = 125 MSPS
0x00 Resolution/
sample rate
override
(requires
transfer
register, 0xFF).
0x101 User I/O Control 2 Open Open Open Open Open Open Open SDIO
pull-
down
0x00 Disables SDIO
pull-down.
0x102 User I/O Control 3 Open Open Open Open VCM
power-
down
Open Open Open 0x00 VCM control.
0x109 Sync Open Open Open Open Open Open Sync
next
only
Enable
sync
0x00