Datasheet

Data Sheet AD9228
Rev. E | Page 35 of 56
Addr.
(Hex) Register Name
(MSB)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
(LSB)
Bit 0
Default
Value
(Hex)
Default Notes/
Comments
14 output_mode X 0 = LVDS
ANSI-644
(default)
1 = LVDS
low power
(IEEE
1596.3
similar)
X X X Output
invert
1 = on
0 = off
(default)
00 = offset binary
(default)
01 = twos
complement
0x00 Configures the
outputs and the
format of the
data.
15 output_adjust X X Output driver
termination
00 = none (default)
01 = 200 Ω
10 = 100 Ω
11 = 100 Ω
X X X X 0x00 Determines
LVDS or other
output properties.
Primarily func-
tions to set the
LVDS span and
common-mode
levels in place of
an external
resistor.
16 output_phase X X X X 0011 = output clock phase adjust
(0000 through 1010)
0000 = 0° relative to data edge
0001 = 60° relative to data edge
0010 = 120° relative to data edge
0011 = 180° relative to data edge (default)
0101 = 300° relative to data edge
0110 = 360° relative to data edge
1000 = 480° relative to data edge
1001 = 540° relative to data edge
1010 = 600° relative to data edge
1011 to 1111 = 660° relative to data edge
0x03 On devices that
utilize global
clock divide,
determines
which phase of
the divider
output is used to
supply the
output clock.
Internal latching
is unaffected.
19 user_patt1_lsb B7 B6 B5 B4 B3 B2 B1 B0 0x00 User-defined
pattern, 1 LSB.
1A user_patt1_msb B15 B14 B13 B12 B11 B10 B9 B8 0x00 User-defined
pattern, 1 MSB.
1B user_patt2_lsb B7 B6 B5 B4 B3 B2 B1 B0 0x00 User-defined
pattern, 2 LSB.
1C user_patt2_msb B15 B14 B13 B12 B11 B10 B9 B8 0x00 User-defined
pattern, 2 MSB.
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).