AD9554 datasheet(71/116 Pages) AD

71 / 116 page

Data Sheet

AD9554

Rev. D | Page 71 of 116

CLOCK PART FAMILY ID (REGISTER 0x0003 TO REGISTER 0x0006)

Table 35. Clock Part Family ID

Address

Bits

Bit Name

Description

0x0003

[7:4]

Reserved

Reserved.

[3:0]

Chip type, Bits[3:0]

The Analog Devices unified SPI protocol reserves this read only register location for

identifying the type of device. The default value of 0x05 identifies the AD9554 as a clock IC.

0x0004

[7:4]

Clock part serial ID, Bits[3:0]

The Analog Devices unified SPI protocol reserves this read only register location as the

lower four bits of the clock part serial ID that (along with Register 0x0005) uniquely

identifies the AD9554 within the Analog Devices clock chip family. No other Analog

Devices chip that adheres to the Analog Devices unified SPI has these values for Register

0x0003, Register 0x0004, and Register 0x0005. Default: 0x9F.

[3:0]

Reserved

Default: 0xF.

0x0005

[7:0]

Clock part serial ID,

Bits[11:4]

The Analog Devices unified SPI protocol reserves this read only register location as the

upper eight bits of the clock part serial ID that (along with Register 0x0004) uniquely

identifies the AD9554 within the Analog Devices clock chip family. No other Analog

Devices chip that adheres to the Analog Devices unified SPI has these values for Register

0x0003, Register 0x0004, and Register 0x0005. Default: 0x00.

0x0006

[7:0]

Part version, Bits[7:0]

The Analog Devices unified SPI protocol reserves this read only register location for

identifying the die revision. Default: 0x05.

SPI VERSION (REGISTER 0x000B)

Table 36. SPI Version

Address

Bits

Bit Name

Description

0x000B

[7:0]

SPI version, Bits[7:0]

The Analog Devices unified SPI protocol reserves this read only register location for identifying

the version of the unified SPI protocol. Default: 0x00.

VENDOR ID (REGISTER 0x000C TO REGISTER 0x000D)

Table 37. Vendor ID

Address

Bits

Bit Name

Description

0x000C

[7:0]

Vendor ID, Bits[7:0]

The Analog Devices unified SPI protocol reserves this read only register location for identifying

Analog Devices as the chip vendor of this device. All Analog Devices devices adhering to the

unified serial port specification have the same value in this register. Default: 0x56.

0x000D

[7:0]

Vendor ID, Bits[15:8]

The Analog Devices unified SPI protocol reserves this read only register location for identifying

Analog Devices as the chip vendor of this device. All Analog Devices devices adhering to the

unified serial port specification have the same value in this register. Default: 0x04.

IO_UPDATE (REGISTER 0x000F)

Table 38. IO_UPDATE

Address

Bits

Bit Name

Description

0x000F

[7:1]

Reserved

Reserved. Default: 0000000b

IO_UPDATE

Writing a 1 to this bit transfers the data in the serial input/output buffer registers to the

internal control registers of the device. This is an autoclearing bit.

USER SCRATCHPAD (REGISTER 0x00FE TO REGISTER 0x00FF)

Table 39. User Scratchpad

Address

Bits

Bit Name

Description

0x00FE

[7:0]

User scratchpad, Bits[7:0]

This register has no effect on device operation. It is available for serial port debugging or

0x00FF

[7:0]

User scratchpad, Bits[15:8]

This register has no effect on device operation. It is available for serial port debugging or

AD9554 Datasheet(PDF) 71 Page - Analog Devices

AD9554 Datasheet(HTML) 71 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL