HMC7044 Datasheet, PDF (44/72 Pages) Analog Devices – JESD204B clock generation

HMC7044
Data Sheet
CONTROL REGISTERS
CONTROL REGISTER MAP
Register addresses that are not listed in Table 25 are not used, and writing to those registers has no effect. Do not change the values of
registers that are marked as reserved. When writing to registers with bits that are marked reserved, take care to always write the default
value for the reserved bits, unless listed otherwise in the other controls subsection of Table 25.
Table 25. Control Register Map
Addr.
(Hex)
Register
Name
Global Control
0x0000 Global soft
reset control
0x0001
Global
request and
mode control
0x0002
0x0003
0x0004
0x0005
Global
enable
control
Global mode
and enable
control
0x0006
0x0007
0x0008
0x0009
Global clear
alarms
Global
miscellaneous
control
PLL1
0x000A
0x000B
0x000C
0x000D
0x000E
0x0014
0x0015
0x0016
CLKIN0/
CLKIN0 input
buffer control
CLKIN1/
CLKIN1 input
buffer control
CLKIN2/
CLKIN2 input
buffer control
CLKIN3/
CLKIN3 input
buffer control
OSCIN/OSCIN
input buffer
control
PLL1
reference
priority
control
PLL1 loss of
signal (LOS)
control
PLL1
holdover exit
control
Bit 7 (MSB) Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
Reserved
Soft reset
Reseed
request
High
performance
distribution
path
Reserved
Reserved
SYNC Pin Mode
Selection[1:0]
High
performance
PLLs/VCO
Force
holdover
Mute
output
drivers
Pulse
Restart
generator dividers/
request FSMs
Sleep
mode
Reserved
PLL2
autotune
trigger
Slip
request
Reserved
RF reseeder
enable
VCO Selection[1:0]
SYSREF
timer
enable
PLL2
enable
PLL1
enable
Seven Pairs of 14-Channel Outputs Enable[6:0]
CLKIN1/
CLKIN1 in
external VCO
input mode
CLKIN0/
CLKIN0 in RF
SYNC input
mode
PLL1 Reference Path Enable[3:0]
Reserved
Clear
alarms
Reserved
Reserved (Scratchpad)
Reserved
Disable
SYNC at
lock
Reserved
Reserved
Reserved
Reserved
Reserved
Fourth Priority
CLKINx/CLKINx Input[1:0]
Input Buffer Mode[3:0]
Buffer
enable
Input Buffer Mode[3:0]
Buffer
enable
Input Buffer Mode[3:0]
Buffer
enable
Input Buffer Mode[3:0]
Buffer
enable
Input Buffer Mode[3:0]
Buffer
enable
Third Priority CLKINx/CLKINx
Input[1:0]
Reserved
Second Priority
CLKINx/CLKINx
Input[1:0]
First Priority
CLKINx/CLKINx
Input[1:0]
LOS Validation Timer[2:0]
Reserved
Holdover Exit
Action[1:0]
Holdover Exit
Criteria[1:0]
Default
Value
(Hex)
0x00
0x00
0x00
0x37
0x7F
0x4F
0x00
0x00
0x00
0x01
0x07
0x07
0x07
0x07
0x07
0xE4
0x03
0x0C
Rev. B | Page 44 of 72