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AD6643 Datasheet(PDF) 30 Page - Analog Devices

Part # AD6643
Description  Dual IF Receiver 1.8 V supply voltages Internal ADC voltage reference
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD6643 Datasheet(HTML) 30 Page - Analog Devices

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AD6643
Rev. 0 | Page 30 of 36
MEMORY MAP REGISTER TABLE
All address and bit locations that are not included in Table 14 are not currently supported for this device.
Table 14. 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)1
0
LSB
first
Soft reset
1
1
Soft reset
LSB first
0
0x18
The nibbles
are mirrored so
LSB-first mode or
MSB-first mode
registers correctly,
regardless of shift
mode
0x01
Chip ID
(global)
8-Bit Chip ID[7:0]
(AD6643 = 0x84)
(default)
0x84
Read only
0x02
Chip grade
(global)
Open
Open
Speed grade ID
10 = 200 MSPS
Open
Open
Open
Open
Speed grade ID
used to
differentiate
devices; read
only
Channel Index and Transfer Registers
0x05
Channel
index
(global)
Open
Open
Open
Open
Open
Open
ADC B
(default)
ADC A
(default)
0x03
Bits are set
to determine
which device on
the chip receives
the next write
command;
applies to local
registers only
0xFF
Transfer
(global)
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 (local)
Open
Open
External
power-
down pin
function
(local)
0 = power-
down
1 = standby
Open
Open
Open
Internal power-down
mode (local)
00 = normal operation
01 = full power-down
10 = standby
11 = reserved
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
Input clock divider
phase adjust
000 = no delay
001 = 1 input clock cycle
010 = 2 input clock cycles
011 = 3 input clock cycles
100 = 4 input clock cycles
101 = 5 input clock cycles
110 = 6 input clock cycles
111 = 7 input clock cycles
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 auto-
matically cause
the duty cycle
stabilizer to
become active


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