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71M6513/71M6513H Demo Board User’s Manual
Page: 64 of 112
©
2005-2006 TERIDIAN Semiconductor Corporation
Revision 5.6
To disable the LCD voltage boost circuit, we apply the following CLI commands:
>RI20$
Reads the hex value of register 0x2020
>8E
Response from Demo Code indicating the bit 7 is set
>RI20=E
Writes the hex value 0x0E to register 0x2020 causing the LCD boost to be switched off
>RI20=8E
Enables the LCD boost circuit
The
LCD_CLK
register determines the frequency at which the COM pins change states. A slower clock means
lower power consumption, but if the clock is too slow, visible flicker can occur. The default clock frequency for
the 71M6513/6513H Demo Boards is 150Hz (
LCD_CLK
= 01).
Register Name
Address [bits]
R/W
Description
LCD_CLK[1:0]
2021[1:0]
R/W
Sets the LCD clock frequency, i.e. the frequency at which SEG
and COM pins change states.
f
w
= CKADC/128 = 38,400
00:
f
w
/2
9
, 01: f
w
/2
8
, 10: f
w
/2
7
, 11: f
w
/2
6
To change the LCD clock frequency, we apply the following CLI commands:
>RI21$
Reads the hex value of register 0x2021
>25
Response from Demo Code indicating the bit 0 is set and bit 1 is cleared.
>RI21=24
Writes the hex value 0x24 to register 0x2021 clearing bit 0 – LCD flicker is visible now
>RI21=25
Writes the original value back to
LCD_CLK
2.6 TERIDIAN APPLICATION NOTES
Please contact your local TERIDIAN sales representative for TERIDIAN Application Notes. Available application notes
are listed below.
Number
Title
AN_651X_007 Rogowski
Coil
AN_651X_008 Optical
Port
AN_651X_009 Temperature Compensation
AN_651X_013 Emulator
Upgrade
AN_651X_016 EMC/EMI
Guidelines
AN_651X_017 LCD
AN_651X_018 Chop
Enable
AN_651X_019 RX
Pin
AN_651X_020
Calibration for Shunt and CT
AN_651X_022 Calibration
Procedures
AN_6513_021 Neutral
Current
http://www.datasheetcatalog.com/