AD9548/PCBZ Analog Devices Inc, AD9548/PCBZ Datasheet - Page 100

• Manufacturer Part Number: AD9548/PCBZ
• Description: Clock Generator Evaluation Board
• Manufacturer: Analog Devices Inc

Specifications of AD9548/PCBZ

• Silicon Manufacturer: Analog Devices
• Application Sub Type: Network Clock Generator/Synchronizer
• Kit Application Type: Clock & Timing
• Silicon Core Number: AD9548
• Kit Contents: Board
• Main Purpose: Timing, Clock Generator
• Embedded: No
• Utilized Ic / Part: AD9548
• Primary Attributes: 62.5 ~ 450 MHz Output Frequency
• Secondary Attributes: SPI and I2C Compatible Control Port
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD9548
Table 138. Input Reference Status
Address
0D0C
0D0D
0D0E
0D0F
0D10
0D11
0D12
0D13
Table 139. Holdover History
Address
0D14
0D15
0D16
0D17
0D18
0D19
1
NONVOLATILE MEMORY (EEPROM) CONTROL (REGISTER 0E00 TO REGISTER 0E03)
Table 140. EEPROM Control
Address
0E00
0E01
0E02
0E03
These registers contain the current 48-bit DDS frequency tuning word generated by the tuning word history logic.
Bits
[7]
[6:4]
[3]
[2]
[1]
[0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
Bits
[7:2]
[1]
[0]
[7:5]
[4:0]
[7:1]
0
[7:2]
[1]
[0]
Bits
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
Profile selected
Selected profile
Valid
Fault
Fast
Slow
Bit Name
Unused
Half rate mode
Write enable
Unused
Condition value
Unused
Save to EEPROM
Unused
Load from EEPROM
Unused
Bit Name
1
Bit Name
Holdover history
Description
EEPROM serial communication rate.
0 (default) = 400 kHz (normal).
1 = 200 kHz.
EEPROM write enable/protect.
0 (default) = EEPROM write protected.
1 = EEPROM write enabled.
When set to a nonzero value (default = 0), these bits establish the condition for
EEPROM downloads.
Upload data to the EEPROM based on the EEPROM storage sequence. This is an
autoclearing bit.
Download data from the EEPROM. This is an autoclearing bit.
The control logic sets this bit when it assigns Ref A to one of the eight profiles.
The index (0 to 7) of the profile assigned to Ref A.
Description
Note that these bits are meaningless unless Bit 7 = 1.
Ref A is valid for use (it is unfaulted and its validation timer has expired).
Ref A is not valid for use.
If Bit 7 = 1, then this bit indicates that the frequency of Ref A is higher than allowed
by its profile settings.
If Bit 7 = 0, then this bit indicates that the frequency of Ref A is above the maximum
input reference frequency supported by the device.
If Bit 7 = 1, then this bit indicates that the frequency of Ref A is lower than allowed by
its profile settings.
If Bit 7 = 0, then this bit indicates that the frequency of Ref A is below the minimum
input reference frequency supported by the device.
Same as 0D0C but for REF AA instead of REF A.
Same as 0D0C but for REF B instead of REF A.
Same as 0D0C but for REF BB instead of REF A.
Same as 0D0C but for REF C instead of REF A.
Same as 0D0C but for REF CC instead of REF A.
Same as 0D0C but for REF D instead of REF A.
Same as 0D0C but for REF DD instead of REF A.
Description
Tuning word readback, Bits[7:0]
Tuning word readback, Bits[15:8]
Tuning word readack, Bits[23:9]
Tuning word readback, Bits[31:24]
Tuning word readback, Bits[39:32]
Tuning word readback, Bits[47:40]
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