AD9517-1 Analog Devices, Inc., AD9517-1 Datasheet - Page 77

• Manufacturer Part Number: AD9517-1
• Description: 12-output Clock Generator With Integrated 2.5 Ghz Vco
• Manufacturer: Analog Devices, Inc.

Reg.
Addr
(Hex) Bit(s) Name
1E1
1E1
Table 60. System
Reg.
Addr
(Hex) Bit(s) Name
230
230
230
Table 61. Update All Registers
Reg.
Addr
(Hex) Bit(s) Name
232
<1>
<0>
<0>
<2>
<1>
<0>
Select VCO or CLK
Bypass VCO Divider
Update All
Registers
Power-Down SYNC
Power-Down Distribution Reference
Soft SYNC
Description
This bit must be set to 1 to transfer the contents of the buffer registers into the active registers. This happens
on the next SCLK rising edge. This bit is self-clearing; that is, it does not have to be set back to 0.
<0> = 1 (self-clearing); update all active registers to the contents of the buffer registers.
Description
Select either the VCO or the CLK as the input to VCO divider.
<1> = 0; select external CLK as input to VCO divider.
<1> = 1; select VCO as input to VCO divider; cannot bypass VCO divider when this is selected.
Bypass or use the VCO divider.
<0> = 0; use VCO divider.
<0> = 1; bypass VCO divider; cannot select VCO as input when this is selected.
Description
Power down the SYNC function.
<2> = 0; normal operation of the SYNC function.
<2> = 1; power-down SYNC circuitry.
Power down the reference for distribution section.
<1> = 0; normal operation of the reference for the distribution section.
<1> = 1; power down the reference for the distribution section.
The soft SYNC bit works the same as the SYNC pin, except that the polarity of the bit
is reversed. That is, a high level forces selected channels into a predetermined static
state, and a 1-to-0 transition triggers a SYNC.
<0> = 0; same as SYNC high.
<0> = 1; same as SYNC low.
Rev. 0 | Page 77 of 80
AD9517-1