AD6642 Analog Devices, AD6642 Datasheet - Page 27

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AD6642

Manufacturer Part Number
AD6642
Description
Dual IF Receiver
Manufacturer
Analog Devices
Datasheet

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MEMORY MAP REGISTER TABLE
All address and bit locations that are not included in Table 13 are not currently supported for this device.
Table 13. Memory Map Registers
Addr.
(Hex)
Chip Configuration Registers
0x00
0x01
Channel Index and Transfer Registers
0x05
0xFF
ADC Function Registers
0x08
0x0B
0x0C
Register
Name
SPI port
configuration
(global)
Chip ID
(global)
Channel
index
Transfer
Power modes
Clock divide
(global)
Shuffle mode
(local)
(MSB)
Bit 7
Open
Open
Open
Open
Open
Open
Bit 6
LSB first
Enable
output
port for
Channel
A and
Channel
B
Open
Open
Open
Open
Bit 5
Soft reset
Open
Open
External
power-
down pin
function
(global)
0 = full
power-
down
1 =
standby
Clock divide phase
000 = 0 input clock cycles delayed
001 = 1 input clock cycle delayed
010 = 2 input clock cycles delayed
Open
AD6642 = 0x7A (default)
8-bit chip ID, Bits[7:0]
Bit 4
1
Open
Open
Open
Open
Rev. A | Page 27 of 32
Bit 3
1
Open
Open
Open
Open
Bit 2
Soft reset
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
Open
Bit 1
LSB first
Channel
B enable
Open
Internal power-down
mode (local)
00 = normal operation
(default)
01 = full power-down
10 = standby
Shuffle mode enable
00 = shuffle disabled
01 = shuffle enabled
(LSB)
Bit 0
Open
Channel
A enable
SW
transfer
1 = on
0 = off
(default)
0x18
0x00
Default
Value
(Hex)
0x7A
0xCF
0x00
0x00
0x01
AD6642
Comments
Nibbles are
mirrored so
that LSB first
or MSB first
mode is set
correctly,
regardless of
shift mode.
To control
this register,
all channel
index bits in
Register 0x05
must be set.
Read only.
Bits are set to
determine
which
channel
on the chip
receives the
next write
command;
applies to
local registers.
Synchro-
nously
transfers
data from
the master
shift register
to the slave.
Determines
generic
modes
of chip
operation.
Enables or
disables
shuffle mode

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