This report applies to mask 1N40H for these products:
Errata ID Errata Title
6396 sLCD: LCD_GCR[RVTRIM] bits are in reverse order
e6396: sLCD: LCD_GCR[RVTRIM] bits are in reverse order
Errata type: Errata
Description: The four bits of LCD_GCR[RVTRIM] are in reverse order, in such a way that the LSB
corresponds to bit 27 and the MSB corresponds to bit 24 of the LCD_GCR. The RVTRIM
adjustment from lower voltage to higher voltage does not follow a linear increase in the
LCD_GCR[RVTRIM] value. The RVTRIM adjustment should follow this sequence:
to achieve a linear increase from lower voltage to higher voltage.
The reset value of this field is still 8, which corresponds to a low voltage value of the VIREG.
Workaround: You can use a lookup table with the correct order of RVTRIM values for a linear change on the
VIREG voltage (contrast). If planning to use a user-selectable contrast, a memory buffer is
required to keep track of the logic value of the RVTRIM. When required to increase or
decrease the contrast of the LCD, the buffer pointer should be increased or decreased
accordingly and the corresponding value from the lookup table should be written to the
To avoid a low voltage on VIREG after reset, LCD_GCR[RVTRIM] must be updated during the
LCD initialization routine.
Freescale Semiconductor KINETIS_L_1N40H
Mask Set Errata Rev 13 FEB 2014
Mask Set Errata for Mask 1N40H
© 2014 Freescale Semiconductor, Inc.
Freescale, the Freescale logo, and Kinetis are trademarks of Freescale Semiconductor,
Inc., Reg. U.S. Pat. & Tm. Off. All other product or service names are the property of
their respective owners.
© 2014 Freescale Semiconductor, Inc.
Information in this document is provided solely to enable system and software
implementers to use Freescale products. There are no express or implied copyright
licenses granted hereunder to design or fabricate any integrated circuits based on the
information in this document.
Freescale reserves the right to make changes without further notice to any products
herein. Freescale makes no warranty, representation, or guarantee regarding the
suitability of its products for any particular purpose, nor does Freescale assume any
liability arising out of the application or use of any product or circuit, and specifically
disclaims any and all liability, including without limitation consequential or incidental
damages. “Typical” parameters that may be provided in Freescale data sheets and/or
specifications can and do vary in different applications, and actual performance may
vary over time. All operating parameters, including “typicals,” must be validated for each
customer application by customer’s technical experts. Freescale does not convey any
license under its patent rights nor the rights of others. Freescale sells products pursuant
to standard terms and conditions of sale, which can be found at the following address:
How to Reach Us:
Home Page:
Web Support: