AD9520-1SLASHPCBZ datasheet(64/80 Pages) AD

64 / 80 page

AD9520-1

Data Sheet

Rev. B | Page 64 of 80

Table 51 to Table 61 provide a detailed description of each of the control register functions.

Table 51. SPI Mode Serial Port Configuration

Reg.

Addr.

(Hex)

Bits

Name

Description

0x000

SDO active

Selects unidirectional or bidirectional data transfer mode.

0: SDIO pin is used for write and read; SDO pin is high impedance (default).

1: SDO pin is used for read; SDIO pin is used for write; unidirectional mode.

LSB first/addr incr

SPI MSB or LSB data orientation. (This bit is ignored in I2C mode.)

0: data-oriented MSB first; the addressing decrements (default).

1: data-oriented LSB first; the addressing increments.

Soft reset

Soft reset.

1 (self-clearing): if the EEPROM pin is high, soft reset loads the register values from the EEPROM. If the

EEPROM pin is low, soft reset loads the register values to the on-chip defaults.

Unused

[3:0]

Mirror[7:4]

Bits[3:0] should always mirror Bits[7:4] so that it does not matter whether the part is in MSB or LSB first mode

(see Register 0x000[6]). Set the bits as follows:

Bit 0 = Bit 7.

Bit 1 = Bit 6.

Bit 2 = Bit 5.

Bit 3 = Bit 4.

0x003

[7:0]

Part ID (read only)

Uniquely identifies the dash version (AD9520-0 to AD9520-5) of the

AD9520, as follows:

AD9520-0: 0x20.

AD9520-1: 0x60.

AD9520-2: 0xA0.

AD9520-3: 0x61.

AD9520-4: 0xE1.

AD9520-5: 0xE0.

0x004

[7:1]

Unused

Unused.

Read back active

registers

Selects register bank used for a readback.

0: reads back buffer registers (default).

1: reads back active registers.

Table 52. I2C Mode Serial Port Configuration

Reg.

Addr.

(Hex)

Bits

Name

Description

0x000

[7:6]

Unused

Soft reset

Soft reset.

1 (self-clearing): if the EEPROM pin is high, soft reset loads the register values from the EEPROM. If the

EEPROM pin is low, soft reset loads the register values to the on chip defaults.

Unused

[3:0]

Mirror[7:4]

Bits[3:0] should always mirror Bits[7:4] so that it does not matter whether the part is in MSB or LSB first mode.

See Table 51, Register 0x000, Bits[3:0].

0x003

[7:0]

Part ID (read only)

Uniquely identifies the dash version (AD9520-0 to AD9520-5) of the AD9520-1. See Table 51, Register 0x003.

0x004

[7:1]

Unused

Unused.

Read back active

registers

Selects register bank used for a readback.

0: reads back buffer registers (default).

1: reads back active registers.

Table 53. EEPROM Customer Version ID

Reg.

Addr.

(Hex)

Bits

Name

Description

0x005

[7:0]

EEPROM customer

version ID (LSB)

16-bit EEPROM ID[7:0]. This register, along with Register 0x006, allows the user to store a unique ID to

identify which version of the

AD9520-1 register settings is stored in the EEPROM. It does not affect AD9520-

1 operation in any way (default: 0x00).

0x006

[7:0]

EEPROM customer

version ID (MSB)

16-bit EEPROM ID[15:8]. This register, along with Register 0x005, allows the user to store a unique ID to

identify which version of the

AD9520-1 register settings is stored in the EEPROM. It does not affect AD9520-1

operation in any way (default: 0x00).

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