AD9544SLASHPCBZ datasheet(55/62 Pages) AD

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Data Sheet

AD9544

Rev. 0 | Page 55 of 62

Multidevice Configuration Example

Consider two AD9544 devices (Device 1 and Device 2) that

share a single EEPROM, and assume both devices have a

common PLL0 configuration but differing PLL1 configurations.

A template for an EEPROM sequence that accomplishes this

configuration is shown in Table 33. The sequence relies on

conditional processing to differentiate between Device 1 and

Device 2. Therefore, the user must program the condition ID

of both devices prior to executing an EEPROM download.

Specifically, the user must program the EEPROM load condition

bit field of Device 1 with a condition ID of 1 and Device 2 with

a condition ID of 2.

Table 33. Template for a Multidevice EEPROM Sequence

Instructions

Comment

0x00 to 0x7F

A sequence of register transfer instructions

associated with the PLL0 configuration

common to both devices

0xB1

Apply Condition 1

0x00 to 0x7F

A sequence of register transfer instructions

associated with the PLL1 configuration

specific to Device 1

0xB0

Clear the condition map

0xB2

Apply Condition 2

0x00 to 0x7F

A sequence of register transfer instructions

associated with the PLL1 configuration

specific to Device 2

0xB0

Clear the condition map

0x80

Input/output update

0xFF

End of sequence

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