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LTC6953 as clock divider

Flylower.Wang
on Nov 27, 2020

I use ltc6953，Config all channel for Mode 0，Srqen set 0，ddely adely also set 0，as datasheet it is free running，only set divider，but no outputs，register 0xb set 0，during config ltc6953，I set sd_ to be 1 all，does it need to config sync operation？anyone can give me a free running config for me，thanks.

And register 0 has field vcook and vcook_，when sd_ set 1，vcook is 1，vcook_ is 0，otherwise vcook is 0，vcook_ is 1；when sd_ is 1，even if no signal in ltc6953's clk in port，vcook also is 1，what means does field vcook？

    •  Analog Employees 
    on Dec 1, 2020 9:31 PM

    I've attached some registers settings for a free running config.  I set all the dividers to two.  The txt file is a list of registers and settings.  The .zip file includes the LTC6952Wizard setup file that can be used with the eval board.  If you are using the eval board and the LTC6952Wizard, you can output all your GUI settings to a text file by selecting File-->Export Register Values.  Our you can use the LTC6952Wizard in simulation mode (without an eval board) to create your register file that way.  You can download the LTC6952Wizard from the LTC6953 product page (https://www.analog.com/media/en/evaluation-boards-kits/evaluation-software/LTC6952_LTC6953_Wizard_Eval_SW.zip )

    VCOOK = 1 when an input signal is applied to the IN+/- pins.  VCOOK = 0 when there is not an input signal applied.  The !VCOOK will display the opposite.  For whatever reason, VCOOK stands for VCO (voltage controlled oscillator) is OK.  In a lot of cases VCOs are attached to the input of our parts, but any input signal will be fine.  That really should be a INOK bit (input ok). 

    LTC6953passthure_regVals.txt 
    # All values in Hexadecimal
#
# Register values from 0x00 to 0x38:
#
0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x08, 0x80, 0x00, 0x00, 0x03

#
# Addr 	Value
#
0x00 	0x00
0x01 	0x04
0x02 	0x00
0x03 	0x00
0x04 	0x00
0x05 	0x00
0x06 	0x00
0x07 	0x00
0x08 	0x00
0x09 	0x00
0x0a 	0x00
0x0b 	0x00
0x0c 	0x08
0x0d 	0x80
0x0e 	0x00
0x0f 	0x00
0x10 	0x08
0x11 	0x80
0x12 	0x00
0x13 	0x00
0x14 	0x08
0x15 	0x80
0x16 	0x00
0x17 	0x00
0x18 	0x08
0x19 	0x80
0x1a 	0x00
0x1b 	0x00
0x1c 	0x08
0x1d 	0x80
0x1e 	0x00
0x1f 	0x00
0x20 	0x08
0x21 	0x80
0x22 	0x00
0x23 	0x00
0x24 	0x08
0x25 	0x80
0x26 	0x00
0x27 	0x00
0x28 	0x08
0x29 	0x80
0x2a 	0x00
0x2b 	0x00
0x2c 	0x08
0x2d 	0x80
0x2e 	0x00
0x2f 	0x00
0x30 	0x08
0x31 	0x80
0x32 	0x00
0x33 	0x00
0x34 	0x08
0x35 	0x80
0x36 	0x00
0x37 	0x00
0x38 	0x03

    LTC6953passthru.zip