AD6654/PCB Analog Devices Inc, AD6654/PCB Datasheet - Page 71

• Manufacturer Part Number: AD6654/PCB
• Description: BOARD EVALUATION FOR AD6654
• Manufacturer: Analog Devices Inc

Specifications of AD6654/PCB

• Module/board Type: Evaluation Board
• For Use With/related Products: AD6554
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ACCESSING MULTIPLE AD6654 DEVICES
If multiple AD6654 devices are on a single board, the microport
pins for these devices can be shared. In this configuration, a
single programming device (DSP, FPGA, or microcontroller)
can program all AD6654 devices connected to it.
Each AD6654 has four CHIPID pins that can be connected in
16 different ways. During a write/read access, the internal
circuitry checks to see if the CHIPID bits in the chip I/O access
control register (Address 0x02) are the same as the logic levels
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of the CHIPID pins (hardwired to the part). If the CHIPID bits
and the CHIPID pins have the same value, then a write/read
access is completed; otherwise, the access is ignored.
To program multiple devices using the same microport control
and data buses, the devices should have separate CHIPID pin
configurations. A write/read access can be made only on the
intended chip; all other chips would ignore the access.
AD6654