Datasheet

Data Sheet AD9520-0
Rev. A | Page 63 of 80
Addr.
(Hex)
Parameter Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)
Default
Value
(Hex)
VCO Divider and CLK Input
0x1E0 VCO divider Unused Unused VCO divider 0x00
0x1E1 Input CLKs Unused Unused
(default = 01b)
Power
down clock
input
section
Power down
VCO clock
interface
Power
down
VCO and
CLK
Select VCO or
CLK
Bypass VCO
divider
0x20
0x1E2
to
0x22A
Unused Unused 0x00
System
0x230 Power-down
and SYNC
Unused Disable
power on
SYNC
Power
down
SYNC
Power down
distribution
reference
Soft SYNC 0x00
0x231 Unused Unused Unused 0x00
Update All Registers
0x232 IO_UPDATE Unused IO_UPDATE
(self clearing)
0x00
0x233
to
0x9FF
Unused
Unused
0x00
EEPROM Buffer Segment
0xA00 Serial port
configuration
Data transfer: one byte 0x00
0xA01 Starting address: Address 0x000 0x00
0xA02 0x00
0xA03 EEPROM customer
version ID
Data transfer: three bytes 0x02
0xA04 Starting address: Address 0x004 0x00
0xA05 0x04
0xA06 PLL settings Data transfer: 16 bytes 0x0E
0xA07 Starting address: Address 0x010 0x00
0xA08 0x10
0xA09 Output driver
control
Data transfer: 16 bytes 0x0E
0xA0A Starting address: Address 0x0F0 0x00
0xA0B 0xF0
0xA0C LVPECL channel
dividers
Data transfer: 12 bytes 0x0B
0xA0D Starting address: Address 0x190 0x01
0xA0E 0x90
0xA0F VCO divider and
CLK input
Data transfer: two bytes 0x01
0xA10 Starting address: Address 0x1E0 0x01
0xA11 0xE0
0xA12 Power-down and
SYNC
Data transfer: two bytes 0x01
0xA13 Starting address: Address 0x230 0x02
0xA14 0x30
0xA15 I/O update Action: IO_UPDATE 0x80
0xA16 End of data Action: end of data 0xFF
0xA17
to
0xAFF
Unused Unused
(available for additional EEPROM instructions)
0x00
EEPROM Control
0xB00 EEPROM status
(read only)
Unused Unused STATUS_
EEPROM
0x00
0xB01 EEPROM error
checking
(read only)
Unused Unused EEPROM
data error
0x00
0xB02 EEPROM Control 1 Unused SOFT_EEPROM
(self-clearing)
Enable
EEPROM write
0x00
0xB03 EEPROM Control 2 Unused Unused REG2EEPROM
(self-clearing)
0x00