DVM1821Z-A0 データシートの表示（PDF） - Solomon Systech

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DVM1821Z-A0

SSD1821Z Development Kit

Solomon Systech  

8051 MCU BOARD

The 8051 MCU Board is powered up by 2 X AA 1.5V battery. A 2X DC con-

verter (ICL7660) is used to generate 4.8V to supply 8051 MCU. This voltage is

also regulated by LM317 to generate VOUT (adjustable from 1.8V to 3.5V)

which in turn powers up solomon LCD driver. All logic output from 8051 are

down-converted from 4.8V to VOUT through 74HC4050 non-inverting buffer.

User can change VOUT by tuning T1 (1K trimmer).The MCU board is configured

to run at a speed of 12MHz. 4 dummy keys are reserved for developing user-

interactive application such as tuning contrast.

Figure 2 EVM89C52-A0 outlook

SOLOMON

Figure 3 DVM1821Z-A0 schematics

Rev 0.1

08/2000

DVK1821Z-A1

2

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