Table 2. Default Jumper Settings - ZiLOG Z8051 Series User Manual

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User manual (55 pages)

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Table of Contents

By default, the Z51F3220 Development Board is set up with preinstalled shunts on J16

jumper pins 1–2 and 5–6 to allow the interfacing of the Z51F3220 MCU's UART0 to the

USB port. When the Board is connected to the USB port of the host PC, LED D5 will be

ON. The default settings and functionalities of these shunts are listed in Table 2.

Headers

J16

As indicated in the table, should you decide to use the the Z51F3220 MCU's UART1

block as the interface for your own project (currently not supported in this release), move

the J16 shunts to positions 3–4 and 7–8.

By default, Input 1 of the ADC is used to measure the supply voltage. This measurement

point is taken from a middle point in the voltage divider circuit that includes resistors R3

and R6; the scaling is performed by software so that the LCD always displays the actual

voltage. For a visual representation, see the schematic diagram in

If a short on the Board should occur, or if its attached component(s) require more than

500 mA, the overcurrent protection functionality will trigger the red LED D6 to illuminate.

In this instance, power to the Board will be terminated, and the USB port of the PC will be

protected from shorting.

Schematic diagrams of the Z51F3220 Development Board are presented

of this document.

The physical dimensions of the Board are 4.01" x 2.50" (101.8 mm x 63.5 mm).

UM024303-0312