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AD9640ABCPZ-105 ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 43 Page - Analog Devices

๋ถ€ํ’ˆ๋ช… AD9640ABCPZ-105
์ƒ์„ธ๋‚ด์šฉ  14-Bit, 80/105/125/150 MSPS, 1.8 V Dual Analog-to-Digital Converter
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AD9640ABCPZ-105 ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 43 Page - Analog Devices

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AD9640
Rev. B | Page 43 of 52
EXTERNAL MEMORY MAP
Table 25. Memory Map Registers
Addr
(Hex)
Register
Name
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
Default
Value
(Hex)
Default
Notes/
Comments
Chip Configuration Registers
0x00
SPI Port
Configuration
(Global)
0
LSB first
Soft reset
1
1
Soft reset
LSB first
0
0x18
The nibbles
are mirrored
so that
LSB-first mode
or MSB-first
mode registers
correctly,
regardless of
shift mode
0x01
Chip ID
(Global)
8-bit Chip ID[7:0]
(AD9640 = 0x11)
(default)
0x11
Read
only
Read only
0x02
Chip Grade
(Global)
Open
Open
Speed grade ID
00 = 150 MSPS
01 = 125 MSPS
10 = 105 MSPS
11 = 80 MSPS
Open
Open
Open
Open
Read
only
Speed grade
ID used to
differentiate
devices
Channel Index and Transfer Registers
0x05
Channel Index
Open
Open
Open
Open
Open
Open
Data
Channel B
(default)
Data
Channel A
(default)
0x03
Bits are set
to determine
which device
on the chip
receives the
next write
command;
applies to local
registers
0xFF
Device Update
Open
Open
Open
Open
Open
Open
Open
Transfer
0x00
Synchronously
transfers data
from the
master shift
register to the
slave
ADC Functions
0x08
Power Modes
Open
Open
External
power-
down pin
function
(global)
0 = pdwn
1 = stndby
Open
Open
Open
Internal power-down
mode (local)
00 = normal operation
01 = full power-down
10 = standby
11 = normal operation
0x00
Determines
various generic
modes of chip
operation
0x09
Global Clock
(Global)
Open
Open
Open
Open
Open
Open
Open
Duty cycle
stabilizer
(default)
0x01
0x0B
Clock Divide
(Global)
Open
Open
Open
Open
Open
Clock divide ratio
000 = divide by 1
001 = divide by 2
010 = divide by 3
011 = divide by 4
100 = divide by 5
101 = divide by 6
110 = divide by 7
111 = divide by 8
0x00
Clock divide
values other
than 000
automatically
cause the duty
cycle stabilizer
to become
active
0x0D
Test Mode
(Local)
Open
Open
Reset PN
long gen
Reset
PNshort
gen
Open
Output test mode
000 = off (default)
001 = midscale short
010 = positive FS
011 = negative FS
100 = alternating checker board
101 = PN long sequence
110 = PN short sequence
111 = one/zero word toggle
0x00
When set,
the test data
is placed on
the output
pins in place of
normal data


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