AD9520-4 Analog Devices, Inc., AD9520-4 Datasheet - Page 67

• Manufacturer Part Number: AD9520-4
• Description: 12 Lvpecl/24 Cmos Output Clock Generator With Integrated 1.6 Ghz Vco
• Manufacturer: Analog Devices, Inc.

REGISTER MAP DESCRIPTIONS
Table 50 through Table 60 provide a detailed description of each of the control register functions. The registers are listed by hexadecimal
address. Reference to a specific bit or range of bits within a register is indicated by square brackets. For example, [3] refers to Bit 3 and
[5:2] refers to the range of bits from Bit 5 through Bit 2.
Table 50. SPI Mode Serial Port Configuration
Reg Addr (Hex)
000
000
000
000
000
004
Table 51. I
Reg Addr (Hex)
000
000
000
000
004
Table 52. EEPROM ID
Reg Addr (Hex)
005
006
2
C Mode Serial Port Configuration
Bit(s)
[7]
[6]
[5]
[4]
[3:0]
[0]
Bit(s)
[7:6]
[5]
[4]
[3:0]
[0]
Bit(s)
[7:0]
[7:0]
Name
SDO active
LSB first/addr incr
Soft reset
Unused
Mirror[7:4]
Readback active registers
Name
Unused
Soft reset
Unused
Mirror[7:4]
Readback active registers
Name
EEPROM customer
version ID (LSB)
EEPROM customer
version ID (MSB)
Description
Selects unidirectional or bidirectional data transfer mode.
[7] = 0; SDIO pin used for write and read; SDO is high impedance (default).
[7] = 1; SDO used for read; SDIO used for write; unidirectional mode.
SPI MSB or LSB data orientation. (This register is ignored in I
[6] = 0; data-oriented MSB first; addressing decrements (default).
[6] = 1; data-oriented LSB first; addressing increments.
Soft Reset.
[5] = 1 (self-clearing). Soft reset; restores default values to internal registers.
Bits[3:0] should always mirror[7:4] so that it does not matter whether the part
is in MSB or LSB first mode (see Register 0x000[6]). User should set bits as follows:
[0] = [7]
[1] = [6]
[2] = [5]
[3] = [4]
Select register bank used for a readback.
[0] = 0; read back buffer registers (default).
[0] = 1; read back active registers.
Description
Soft Reset.
[5] = 1 (self-clearing). Soft reset; restores default values to internal registers.
Bits[3:0] should always mirror[7:4] so that it does not matter whether the part is
in MSB or LSB first mode (see Register 0x000[6]). Set bits as follows:
[0] = [7]
[1] = [6]
[2] = [5]
[3] = [4]
Select register bank used for a readback.
[0] = 0; read back buffer registers. (default)
[0] = 1; read back active registers.
Description
16-bit EEPROM ID[7:0]. This register, along with 0x006, allow the user to store a
unique ID to identify which version of the AD9520 register settings is stored in the
EEPROM. It does not affect AD9520 operation in any way (default: 0x00).
16-bit EEPROM ID[15:8]. This register, along with 0x005, allow the user to store a
unique ID to identify which version of AD9520 register settings is stored in the
EEPROM. It does not affect AD9520 operation in any way (default: 0x00).
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C mode.)
AD9520-4