Analog Devices AD9253 Evaluation Board AD9253-125EBZ AD9253-125EBZ 데이터 시트
제품 코드
AD9253-125EBZ
AD9253
Data Sheet
Rev. 0 | Page 34 of 40
MEMORY MAP REGISTER TABLE
uses a 3-wire interface and 16-bit addressing and,
therefore, Bit 0 and Bit 7 in Register 0x00 are set to 0, and Bit 3
and Bit 4 are set to 1. When Bit 5 in Register 0x00 is set high,
and Bit 4 are set to 1. When Bit 5 in Register 0x00 is set high,
the SPI enters a soft reset, where all of the user registers revert
to their default values and Bit 2 is automatically cleared.
to their default values and Bit 2 is automatically cleared.
Table 17.
ADDR
(Hex) Parameter
(Hex) Parameter
Name
Bit 7
(MSB)
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
(LSB)
Default
Value
(Hex) Comments
Value
(Hex) Comments
Chip Configuration Registers
0x00 SPI
port
configuration
0 =
SDO
active
SDO
active
LSB first
Soft
reset
reset
1 =
16-bit
address
16-bit
address
1 =
16-bit
address
16-bit
address
Soft
reset
reset
LSB first
0 = SDO
active
active
0x18 The
nibbles
are mirrored
so that LSB-
first or MSB-
first mode
registers
correctly. The
default for
ADCs is 16-bit
mode.
so that LSB-
first or MSB-
first mode
registers
correctly. The
default for
ADCs is 16-bit
mode.
0x01
Chip ID (global)
8-bit chip ID, Bits[7:0]
0x8F Unique
chip
ID used to
differentiate
devices; read
only.
differentiate
devices; read
only.
0x02 Chip
grade
(global)
Open
Speed grade ID[6:4]
100 = 80 MSPS
101 = 105 MSPS
110 = 125 MSPS
110 = 125 MSPS
Open Open Open Open
Unique
speed grade
ID used to
differentiate
graded
devices; read
only.
ID used to
differentiate
graded
devices; read
only.
Device Index and Transfer Registers
0x05 Device
index
Open Open
Clock
Channel
DCO
Channel
DCO
Clock
Channel
FCO
Channel
FCO
Data
Channel
D
Channel
D
Data
Channel
C
Channel
C
Data
Channel
B
Channel
B
Data
Channel
A
Channel
A
0x3F
Bits are set to
determine
which device
on chip
receives the
next write
command.
The default is
all devices on
chip.
determine
which device
on chip
receives the
next write
command.
The default is
all devices on
chip.
0xFF Transfer
Open Open
Open Open Open Open Open Initiate
override
0x00 Set
resolution/
sample rate
override.
override.
Global ADC Function Registers
0x08 Power
modes
(global)
Open Open
External
power-
down
pin
function
0 = full
power-
down
1 =
standby
power-
down
pin
function
0 = full
power-
down
1 =
standby
Open Open Open Power
mode
00 = chip run
01 = full power-
down
10 = standby
11 = reset
0x00 Determines
various
generic
modes of chip
operation.
generic
modes of chip
operation.
0x09 Clock
(global)
Open Open
Open Open Open Open Open Duty
cycle
stabilize
0 = off
1 = on
stabilize
0 = off
1 = on
0x01 Turns
duty
cycle stabilizer
on or off.
on or off.