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Mikroelektronika d.o.o.

PLL Click Board

PLL Click Board

SKU: MIKROE-2993
Regular price
£15.00 inc VAT
£12.60 exc VAT
Regular price £18.00 GBP Sale price
£15.00 inc VAT
£12.60 exc VAT
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Overview

The PLL Click Board™ is a frequency multiplier that uses the Phase-Locked Loop (PLL) techniques to provide a high-frequency clock output from a cheap, standard fundamental mode crystal oscillator. In addition to this, PLL Click Board™ also offers a choice between nine different multiplication factors, programmed via states of the two input pins. The output range of the PLL Click Board™ goes up to 160MHz.

The PLL Click Board™ is a frequency multiplier which uses the Phase-Locked Loop (PLL) techniques to provide a high-frequency clock output from a cheap, standard fundamental mode crystal oscillator. In addition to this, PLL click also offers a choice between nine different multiplication factors, programmed via states of the two input pins. The output range of the PLL click goes up to 160MHz.

Besides the fixed 12MHz crystal oscillator, the PLL Click Board™ can also use a PWM signal source brought from the PWM pin of the mikroBUS™, offering a possibility to continuously adjust the output frequency. Featuring a very precise PLL multiplication, very low output jitter of 25ps, tri-state output for board level testing, both onboard and external clock inputs, ability to change clock "on the fly", compatibility with all the 3.3V and 5V MCUs, and selectable multiplication factor, this Click board™ can be used for development and prototyping of various applications which can benefit from having an adjustable system clock generator, or for any general purpose application that demands cheap solution for the high-speed system clock.

How Does The PLL Click Board™ Work?

The PLL Click Board™ is equipped with the ICS501, a LOCO™ PLL clock multiplier, from Integrated Device Technology. This IC uses the Phase-Locked Loop to provide a high-frequency clock output, deriving input from a much cheaper, standard fundamental frequency crystal oscillator. Besides the onboard crystal oscillator fixed at 12MHz, it is possible to select the signal from the mikroBUS™ PWM pin as the clock input source.

To select the desired multiplication factor, the states of the two input pins S0 and S1, routed to the mikroBUS™ pins RST and AN, respectively. These pins can be set to a HIGH logic state, LOW logic state, or can be disconnected (by tri-stating the MCU pins). The combination of these pins states will set the PLL click to a specific multiplier. To set the multiplication factor of the PLL click, please consult the multiplication selection table, below.

The Output Enable (OE) pin of the ICS501, is used to disable the output clock, by setting it to a LOW logic level. It will additionally set the clock output pin in high impedance (Hi-Z) mode, allowing complete disconnection and no influence on the rest of the circuit, which is useful for experimenting and prototyping purposes. This pin is internally pulled to a HIGH logic level. The OE pin is routed to the CS pin of the mikroBUS™.

The PLL Click Board™ is equipped with two onboard SMD jumpers. The SMD jumper labelled as the VCC SEL is used to select the operating voltage level, consequently limiting the amplitude of the clock output signal, in respect to the selected voltage. The other SMD jumper labelled as the OSC SEL is used to choose the clock input source between the onboard 12MHz crystal oscillator or the external clock signal. The output signal is routed through the onboard SMA connector, which provides a secure connection and good signal shielding.

The PLL Click Board™ comes with the library that contains functions for all the MikroElektronika compilers (mikroBASIC, mikroPASCAL, and mikroC). Although relatively easy to control it, the library offers comprehensive functions that make the code more readable and are easy to use. The included example application demonstrates the use of these functions and it can be used as a reference for custom projects.

SPECIFICATIONS

Type Clock generator
Applications The PLL Click Board™ can be used for development and prototyping of various applications which can benefit from having an adjustable system clock generator, or for any general purpose application that demands cheap solution for the high-speed system clock.
On-board modules ICS501, a LOCO™ PLL clock multiplier, from Integrated Device Technology
Key Features Precise PLL multiplication, very low output jitter of 25ps, the tri-state output for board level testing, both onboard and external clock inputs, etc.
Interface GPIO
Compatibility mikroBUS
Click board size M (42.9 x 25.4 mm)
Input Voltage 3.3V or 5V

PINOUT DIAGRAM

This table shows how the pinout of the PLL Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes Pin Mikrobus logo.png Pin Notes
Multiplier adjustment pin 1 S1 1 AN PWM 16 ICK External clock source
Multiplier adjustment pin 0 S0 2 RST INT 15 NC
Output enable OE 3 CS RX 14 NC
NC 4 SCK TX 13 NC
NC 5 MISO SCL 12 NC
NC 6 MOSI SDA 11 NC
Power supply +3.3V 7 3.3V 5V 10 +5V Power supply
Ground GND 8 GND GND 9 GND Ground

PLL CLICK SPECIFICATIONS

Description Min Typ Max Unit
Input frequency - crystal input - 12 - MHz
Input frequency - clock input 2 - 50 MHz
Absolute clock period jitter -75 - 75 ps


ONBOARD SETTINGS AND INDICATORS

Label Name Default Description
LD1 PWR - Power LED indicator
JP1 VCC SEL Left Power supply voltage selection: left position 3V3, right position 5V
JP2 OSC SEL Left Input clock signal source selection: left position onboard 12MHz crystal oscillator, right position external clock from PWM pin

 

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