MC145200EVK 查看數據表（PDF） - Motorola => Freescale

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MC145200EVK

Evaluation Boards

Motorola => Freescale 

SECTION 1 – HARDWARE

FEATURES

1. The EVK is a complete working synthesizer, including VCO.

2. Control program is written in Turbo Pascal.

3. Board is controlled by an IBM PC–compatible computer through the printer port.

4. Up to three boards can be operated independently through one printer port.

5. A prototype area and mounting holes are provided for VCOs, mixers, and amplifiers.

6. External reference input can be used.

7. Five element loop filter is included.

8. Frequency range of operation, step size and reference frequency can be changed in the control

program.

9. Lock Detect, Out A, and Out B on any single board are accessible through the printer port.

CONTENTS OF EVALUATION KIT

1. Assembled evaluation board.

2. Nine–foot flat cable with four DB–25 male connectors.

3. MC145190/191/200/201 EVK manual.

4. 3.5″ PC–compatible disk containing compiled program.

5. PLL device data sheets.

GETTING STARTED

To perform basic functions, do the following:

1. Plug in 12 volts at J6, observing the polarity marked on the board.

2. Short circuit section 1 of the DIP switch (S1) and open circuit all other sections.

3. Connect the supplied flat cable between the computer printer port and the DB–25 connector on

the board (J5).

4. Type PLLDEMO at the DOS prompt. Then press enter.

5. Type the number that corresponds with the type of board given in the on–screen menu. Then

press Q.

You should now see the main menu displayed. There should be a signal present at J8 on the current

output frequency given in the main menu. If the signal is not on the correct frequency, check to see if your

printer card address is $278 (hexadecimal 278). If not, then select the P menu item and enter the correct

address. After returning to the main menu, select the I menu item to send data to the board. You should

now be on frequency.

MODIFICATIONS

The user may modify the hardware, such as utilizing a different VCO, by using the prototyping area of the

board. After such modifications are made, the default values in the software may need to be changed.

This is facilitated from screen #2 ‘Select from the available options’ screen.

Note that the on–board voltage regulators allow for maximum control voltage to the VCO of approximate-

ly 7.8 V for the MC145190EVK and MC145200EVK. The maximum VCO control voltage is approximately

4.3 V for the MC145191EVK and MC145201EVK. The minimum voltage for all four devices is 0.5 V.

MOTOROLA

MC145190EVK

3

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