Figure 4. Z51F3220 Development Board: Highlighted Components - ZiLOG Z8051 Series User Manual

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USB interface providing power and communication to the Board through adjustable
LD0: U5
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Power supply level that can be adjusted with potentiometer R22
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Overcurrent protection circuit on the Board: U6 and D6
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External source of reference voltage (2.5 V) for the on-chip ADC: VR1
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MCU current consumption measurement resistor R7 with test points J4 and J5
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Buzzer: U1
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4-digit, 7-segment LCD panel
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Test points, headers and prototype area with two footprints
OCD Connector J1

Figure 4. Z51F3220 Development Board: Highlighted Components

UM024303-0312
R3 and R6 Voltage Divider
Z51F3220 Development Kit
VR1 On-Chip ADC
Z51F3220 MCU
USB Power LED D5
Overcurrent LED D6
User Manual
5
USB-to-UART IC
Introduction