Power Indicator/General-Purpose Leds; Analog I/O Connections; General-Purpose Prototype Area; External Memories And Latch Footprint - Analog Devices ADuC7026 Application Notes

POWER INDICATOR/GENERAL-PURPOSE LEDS

A power LED (D3) is used to indicate that a sufficient supply is
available on the board. A general-purpose LED (D2) is directly
connected to P4.2 of the ADuC7026. When P4.2 is cleared, the
LED is turned on, and when P4.2 is set, the LED is turned off.

ANALOG I/O CONNECTIONS

All analog I/O connections are brought out on Header J3.
ADC0 and ADC1 are buffered using an AD8606 to evaluate
single-ended and pseudo differential mode. A potentiometer
can be connected to ADC0 (buffered).
ADC3 and ADC4 can be buffered with a single-ended to
differential op amp on-board, with the AD8132 used to evaluate
the ADC in fully differential mode.
ADC2 and ADC5 to ADC11 are not buffered. Be sure to follow
the data sheet recommendations when connecting signals to
these inputs.
DAC1 can be used to control the brightness of the LED D1,
when connected via the S1 switch.

GENERAL-PURPOSE PROTOTYPE AREA

General-purpose prototype areas are provided at the bottom of
the evaluation board for adding external components as
required in the user's application. AV
DGND tracks are provided in the prototype area.

EXTERNAL MEMORIES AND LATCH FOOTPRINT

Footprints for a 32 k × 16 static RAM (CY7C1020CV33), a
64 k × 16 flash (AT29LV1024), and a16-bit latch are also
on-board. See the External Memory Interface section.
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