Analog Devices MICROCONVERTER ADUC7024 Reference Manual page 5

To enter serial download mode the user must pull the P0.0/BM pin low while reset is toggled. On the
evaluation board serial download mode can be easily initiated by holding down the serial download push
button (S2) while inserting and releasing the reset button (S3) as illustrated in Figure 1.
(A) S3 & S2 RELEASED
S3
(RESET=1)
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 ADuC7024. When P4.2 is cleared the LED will be
turned ON and when P4.2 is set the LED will be turned off.
Analog I/O Connections:
All analog I/O are brought out on header J3.
ADC0 and ADC1 are buffered using a 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, the AD8132 used
to evaluate the ADC in fully differential mode.
ADC2 and ADC5 to ADC9 are not buffered. Be sure to follow the datasheet recommendation when
connecting signals to these inputs.
DAC1 can be used to controlled the brightness of the green 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 users application. As can be seen from the layout AV
and DGND tracks are provided in this prototype area.
Rev. 1.0
ADuC7024 Evaluation Board Reference Guide
S2
(BM=1) (RESET=1)
(D) RELEASE S3
S3
S2
(RESET=1)
(BM=0)
Figure 1: Entering Serial Download Mode on the Evaluation Board.
(B) PUSH S2
S3 S2
(BM=0)
(E) RELEASE S2
S3
(RESET=1)
Page 5 of 15
(2) Evaluation Board Features
(C) PUSH S3
S3 S2
(RESET=0) (BM=0)
S2
(BM=1)
, AGND, V
DD
Analog Devices Inc., MicroConverter
www.analog.com/microconverter
DDIO
