Analog Devices AD9273, Manual

Page: 44 / 49

AD9273
Rev. B | Page 43 of 48
Addr.
(Hex) Register
Name
Bit 7
(MSB)
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Bit 0
(LSB) Default
Value Default Notes/
Comments
19 USER_PATT1_LSB B7 B6 B5 B4 B3 B2 B1 B0 0x00 User-defined
pattern, 1 LSB
(global).
1A USER_PATT1_MSB B15 B14 B13 B12 B11 B10 B9 B8 0x00 User-defined
pattern, 1 MSB
(global).
1B USER_PATT2_LSB B7 B6 B5 B4 B3 B2 B1 B0 0x00 User-defined
pattern, 2 LSB
(global).
1C USER_PATT2_MSB B15 B14 B13 B12 B11 B10 B9 B8 0x00 User-defined
pattern, 2 MSB
(global).
21 SERIAL_CONTROL LSB first
1 = on
0 = off
(default)
X X X <10
MSPS,
low
encode
rate
mode
1 = on
0 = off
(default)
000 = 12 bits (default, normal
bit stream)
001 = 8 bits
010 = 10 bits
011 = 12 bits
100 = 14 bits 0x00 Serial stream
control. Default
causes MSB first
and the native bit
stream (global).
22 SERIAL_CH_STAT X X X X X X Channel
output
reset
1 = on
0 = off
(default)
Channel
power-
down
1 = on
0 = off
(default) 0x00 Used to power
down individual
sections of a
converter (local).
2B FLEX_FILTER X Enable
automatic
low-pass
tuning
1 = on
(self-
clearing) X X High-pass filter cutoff
0000 = f
LP
/20.7
0001 = f
LP
/11.5
0010 = f
LP
/7.9
0011 = f
LP
/6.0
0100 = f
LP
/4.9
0101 = f
LP
/4.1
0110 = f
LP
/3.5
0111 = f
LP
/3.1
0x00 Filter cutoff
(global). (f
LP
=
low-pass filter
cutoff frequency.)
2C ANALOG_INPUT X X X X X X LOSW-x connect
00 = high-Z
01 = (−)LNA output
10 = (+)LNA output
11 = high-Z
0x00 LNA active
termination/input
impedance
(global).
2D CROSS_POINT_
SWITCH
X X Crosspoint switch enable
10 0000 = CWD0± (differential)
10 0001 = CWD1± (differential)
10 0010 = CWD2± (differential)
10 0011 = CWD3± (differential)
10 0100 = CWD4± (differential)
10 0101 = CWD5± (differential)
10 0110 = CWD6± (differential)
10 0111 = CWD7± (differential)
11 0000 = CWD0+ (single ended)
11 0001 = CWD1+ (single ended)
11 0010 = CWD2+ (single ended)
11 0011 = CWD3+ (single ended)
11 0100 = CWD4+ (single ended)
11 0101 = CWD5+ (single ended)
11 0110 = CWD6+ (single ended)
11 0111 = CWD7+ (single ended)
11 1000 = CWD0− (single ended)
11 1001 = CWD1− (single ended)
11 1010 = CWD2− (single ended)
11 1011 = CWD3− (single ended)
11 1100 = CWD4− (single ended)
11 1101 = CWD5− (single ended)
11 1110 = CWD6− (single ended)
11 1111 = CWD7− (single ended)
0x xxxx = power down CW channel (default)
0x00 Crosspoint switch
enable (local).