Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

LTC6904: 1kHz to 68MHz Serial Port Programmable Oscillator. More...

Detailed Description

LTC6904: 1kHz to 68MHz Serial Port Programmable Oscillator.

The LTC6903/LTC6904 are low power self contained digital
frequency sources providing a precision frequency from
1kHz to 68MHz, set through a serial port. The LTC6903/
LTC6904 require no external components other than a
power supply bypass capacitor, and they operate over a
single wide supply range of 2.7V to 5.5V.

http://www.linear.com/product/LTC6904

http://www.linear.com/product/LTC6904#demoboards

Copyright 2018(c) Analog Devices, Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  • Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
  • Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
  • Neither the name of Analog Devices, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
  • The use of this software may or may not infringe the patent rights of one or more patent holders. This license does not release you from the requirement that you obtain separate licenses from these patent holders to use this software.
  • Use of the software either in source or binary form, must be run on or directly connected to an Analog Devices Inc. component.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Library Header File for LTC6904: 1kHz to 68MHz Serial Port Programmable Oscillator

Definition in file LTC6904.h.

Go to the source code of this file.

Functions

uint8_t LTC6904_write (uint8_t address, uint16_t code)
 Writes 2 bytes. More...
 
uint16_t LTC6904_frequency_to_code (float frequency, uint8_t clk)
 Calculates the code necessary to create the clock frequency. More...
 

Macros

#define LTC6904_ADDRESS   0x17
 ADR 0. More...
 
#define LTC6904_CLK_ON_CLK_INV_ON   0x00
 Clock on, inverted clock on. More...
 
#define LTC6904_CLK_OFF_CLK_INV_ON   0x01
 Clock off, inverted clock on. More...
 
#define LTC6904_CLK_ON_CLK_INV_OFF   0x02
 Clock on, inverted clock off. More...
 
#define LTC6904_POWER_DOWN   0x03
 Powers down clocks. More...
 
#define LTC6904_OCT_15   0x0F
 
OCT Options f>= (MHz) f< (MHz)
LTC6904_OCT_15 34.05 68.03
LTC6904_OCT_14 17.02 34.01
LTC6904_OCT_13 8.5111 17.01
LTC6904_OCT_12 4.256 8.503
LTC6904_OCT_11 2.128 4.252
LTC6904_OCT_10 1.064 2.126
LTC6904_OCT_9 0.532 1.063
LTC6904_OCT_8 0.266 0.5314
LTC6904_OCT_7 0.133 0.2657
LTC6904_OCT_6 0.0665 0.1329
LTC6904_OCT_5 0.03325 0.06643
LTC6904_OCT_4 0.01662 0.03322
LTC6904_OCT_3 0.008312 0.01661
LTC6904_OCT_2 0.004156 0.008304
LTC6904_OCT_1 0.002078 0.004152
LTC6904_OCT_0 0.001039 0.002076
More...
 
#define LTC6904_OCT_14   0x0E
 
#define LTC6904_OCT_13   0x0D
 
#define LTC6904_OCT_12   0x0C
 
#define LTC6904_OCT_11   0x0B
 
#define LTC6904_OCT_10   0x0A
 
#define LTC6904_OCT_9   0x09
 
#define LTC6904_OCT_8   0x08
 
#define LTC6904_OCT_7   0x07
 
#define LTC6904_OCT_6   0x06
 
#define LTC6904_OCT_5   0x05
 
#define LTC6904_OCT_4   0x04
 
#define LTC6904_OCT_3   0x03
 
#define LTC6904_OCT_2   0x02
 
#define LTC6904_OCT_1   0x01
 
#define LTC6904_OCT_0   0x00
 

Function Documentation

◆ LTC6904_frequency_to_code()

uint16_t LTC6904_frequency_to_code ( float  frequency,
uint8_t  clk 
)

Calculates the code necessary to create the clock frequency.

Returns
the code for the LTC6904
Parameters
frequencyClock frequency in MHz
clkOutput configuration

Definition at line 82 of file LTC6904.cpp.

◆ LTC6904_write()

uint8_t LTC6904_write ( uint8_t  address,
uint16_t  code 
)

Writes 2 bytes.

Returns
1 if successful, 0 if failure
Parameters
addressI2C address
codeCode to be written

Definition at line 73 of file LTC6904.cpp.

Macro Definition Documentation

◆ LTC6904_ADDRESS

#define LTC6904_ADDRESS   0x17

ADR 0.

Definition at line 64 of file LTC6904.h.

◆ LTC6904_CLK_OFF_CLK_INV_ON

#define LTC6904_CLK_OFF_CLK_INV_ON   0x01

Clock off, inverted clock on.

Definition at line 110 of file LTC6904.h.

◆ LTC6904_CLK_ON_CLK_INV_OFF

#define LTC6904_CLK_ON_CLK_INV_OFF   0x02

Clock on, inverted clock off.

Definition at line 111 of file LTC6904.h.

◆ LTC6904_CLK_ON_CLK_INV_ON

#define LTC6904_CLK_ON_CLK_INV_ON   0x00

Clock on, inverted clock on.

Definition at line 109 of file LTC6904.h.

◆ LTC6904_OCT_0

#define LTC6904_OCT_0   0x00

Definition at line 105 of file LTC6904.h.

◆ LTC6904_OCT_1

#define LTC6904_OCT_1   0x01

Definition at line 104 of file LTC6904.h.

◆ LTC6904_OCT_10

#define LTC6904_OCT_10   0x0A

Definition at line 95 of file LTC6904.h.

◆ LTC6904_OCT_11

#define LTC6904_OCT_11   0x0B

Definition at line 94 of file LTC6904.h.

◆ LTC6904_OCT_12

#define LTC6904_OCT_12   0x0C

Definition at line 93 of file LTC6904.h.

◆ LTC6904_OCT_13

#define LTC6904_OCT_13   0x0D

Definition at line 92 of file LTC6904.h.

◆ LTC6904_OCT_14

#define LTC6904_OCT_14   0x0E

Definition at line 91 of file LTC6904.h.

◆ LTC6904_OCT_15

#define LTC6904_OCT_15   0x0F

OCT Options f>= (MHz) f< (MHz)
LTC6904_OCT_15 34.05 68.03
LTC6904_OCT_14 17.02 34.01
LTC6904_OCT_13 8.5111 17.01
LTC6904_OCT_12 4.256 8.503
LTC6904_OCT_11 2.128 4.252
LTC6904_OCT_10 1.064 2.126
LTC6904_OCT_9 0.532 1.063
LTC6904_OCT_8 0.266 0.5314
LTC6904_OCT_7 0.133 0.2657
LTC6904_OCT_6 0.0665 0.1329
LTC6904_OCT_5 0.03325 0.06643
LTC6904_OCT_4 0.01662 0.03322
LTC6904_OCT_3 0.008312 0.01661
LTC6904_OCT_2 0.004156 0.008304
LTC6904_OCT_1 0.002078 0.004152
LTC6904_OCT_0 0.001039 0.002076

Definition at line 90 of file LTC6904.h.

◆ LTC6904_OCT_2

#define LTC6904_OCT_2   0x02

Definition at line 103 of file LTC6904.h.

◆ LTC6904_OCT_3

#define LTC6904_OCT_3   0x03

Definition at line 102 of file LTC6904.h.

◆ LTC6904_OCT_4

#define LTC6904_OCT_4   0x04

Definition at line 101 of file LTC6904.h.

◆ LTC6904_OCT_5

#define LTC6904_OCT_5   0x05

Definition at line 100 of file LTC6904.h.

◆ LTC6904_OCT_6

#define LTC6904_OCT_6   0x06

Definition at line 99 of file LTC6904.h.

◆ LTC6904_OCT_7

#define LTC6904_OCT_7   0x07

Definition at line 98 of file LTC6904.h.

◆ LTC6904_OCT_8

#define LTC6904_OCT_8   0x08

Definition at line 97 of file LTC6904.h.

◆ LTC6904_OCT_9

#define LTC6904_OCT_9   0x09

Definition at line 96 of file LTC6904.h.

◆ LTC6904_POWER_DOWN

#define LTC6904_POWER_DOWN   0x03

Powers down clocks.

Definition at line 112 of file LTC6904.h.