AD9508PCBZ datasheet(33/40 Pages) AD

33 / 40 page

Data Sheet

AD9508

Rev. A | Page 33 of 40

SERIAL PORT CONFIGURATION (REGISTER 0x00)

Table 24. Serial Configuration

Address

Bits

Bit Name

Description

0x00

SDO enable

Enables SPI port SDO pin. This bit does nothing in I²C mode.

1 = 4-wire (SDO pin enabled).

0 = 3-wire (default).

LSB first/increment address

Bit order for the SPI port. This bit is nonfunctional in I²C mode.

1 = LSB and byte first. Register addresses are automatically incremented in multibyte

transfers.

0 = MSB and byte first (default). Register addresses are automatically decremented in

multibyte transfers.

Soft reset

Device reset.

[4:3]

Reserved

Reserved.

Soft reset

Same function as Bit 5 of this register, set Bit 2 and Bit 5 to the same value.

LSB first/increment address

Same function as Bit 6 of this register, set Bit 1 and Bit 6 to the same value.

SDO enable

Same function as Bit 7 of this register, set Bit 7 and Bit 0 to the same value.

SILICON REVISION (REGISTER 0x0A TO REGISTER 0x0D)

Table 25. Silicon Revision

Address

Bits

Bit Name

Description

0x0A

[7:0]

Silicon Revision[7:0]

A read-only register. Identifies the revision level of the AD9508.

0x0B

[7:0]

Reserved

0x00 = default.

0x0C

[7:0]

Clock Part Family ID[7:0]

A read-only register. This register, together with Register 0x000D, uniquely identifies an

AD9508. No other device in the Analog Devices, Inc., AD95xx family has a value of 0x0005 in

these two registers.

0x05 = default.

0x0D

[7:0]

Clock Part Family ID[15:8]

This register is a continuation of Register 0x000C.

0x00 = default.

CHIP LEVEL FUNCTIONS (REGISTER 0x12 TO REGISTER 0x14)

Table 26. Sleep and Synchronization

Address

Bits

Bit Name

Description

0x12

[7:0]

Reserved

0x00000010 = default

0x13

[7:5]

Reserved

0x000 = default

Sleep

0 = disables sleep mode (default)

1 = enables sleep mode

[3:0]

Reserved

0x0000 = default

0x14

[7:1]

Reserved

0x0000000 = default

SYNC_BAR

0 = enables a software output synchronization routine

1 = output synchronization via software disabled (default)

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