AD9547/PCBZ Analog Devices Inc, AD9547/PCBZ Datasheet - Page 88

• Manufacturer Part Number: AD9547/PCBZ
• Description: Clock Generator/Synchronizer Evaluation Board
• Manufacturer: Analog Devices Inc

Specifications of AD9547/PCBZ

• Silicon Manufacturer: Analog Devices
• Application Sub Type: Network Clock Generator/Synchronizer
• Kit Application Type: Clock & Timing
• Silicon Core Number: AD9547
• Main Purpose: Timing, Clock Generator
• Embedded: No
• Utilized Ic / Part: AD9547
• Primary Attributes: 2 Differential or 4 Single Ended Inputs
• Secondary Attributes: CMOS, LVPECL & LVDS Compatible
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD9547
OPERATIONAL CONTROLS (REGISTER 0x0A00 TO REGISTER 0x0A10)
Table 118. General Power-Down
Address
0x0A00
Table 119. Loop Mode
Address
0x0A01
Bit
7
6
5
4
3
2
1
0
7
6
5
[4:3]
2
[1:0]
Bit
Bit Name
Reset sans regmap
Unused
SYSCLK power-down
Reference power-down
TDC power-down
DAC power-down
Dist power-down
Full power-down
Bit Name
Unused
User holdover
User free run
User selection mode
Unused
User reference selection
Reset internal hardware but retain programmed register values.
0 (default) = normal operation.
1 = reset.
Unused.
Place SYSCLK input and PLL in deep sleep mode.
0 (default) = normal operation.
1 = power-down.
Place reference clock inputs in deep sleep mode.
0 (default) = normal operation.
1 = power-down.
Place the time-to-digital converter in deep sleep mode.
0 (default) = normal operation.
1 = power-down.
Place the DAC in deep sleep mode.
0 (default) = normal operation.
1 = power-down.
Place the clock distribution outputs in deep sleep mode.
0 (default) = normal operation.
1 = power-down.
Place the entire device in deep sleep mode.
0 (default) = normal operation.
1 = power-down.
Description
Description
Unused.
Force the device into holdover mode.
0 (default) = normal operation.
1 = force device into holdover mode.
The device functions as though all input references are faulted.
Force the device into free-run mode.
0 (default) = normal operation.
1 = force device into free-run mode.
The free-running frequency tuning word register (Address 0x0300 to Address 0x0305)
specifies the DDS output frequency.
Note that, when user free run is set, it overrides user holdover.
Select the operating mode of the reference switching state machine.
00 (default) = automatic mode. The fully automatic priority-based algorithm selects the
active reference (Bits[1:0] are ignored).
01 = fallback mode. The active reference is the user reference (Bits[1:0]) as long as it is valid.
Otherwise, use the fully automatic priority-based algorithm to select the active reference.
10 = holdover mode. The active reference is the user reference (Bits[1:0]) as long as it is
valid. Otherwise, enter holdover mode.
11 = manual mode. The active reference is always the user reference (Bits[1:0]). When using
manual mode, be sure that the reference declared as the user reference (Bits[1:0]) is
programmed for manual reference-to-profile assignment in the appropriate manual
reference profile selection register (Address 0x0503 and Address 0x0506).
Unused. Write a 0 to this bit.
Input reference when user selection mode = 01, 10, or 11.
00 (default) = Input Reference A.
01 = Input Reference AA.
10 = Input Reference B.
11 = Input Reference BB.
Rev. B | Page 88 of 104