Freescale Semiconductor Mask Set Errata KINETIS_L_1N40H Rev 13 FEB 2014 Mask Set Errata for Mask 1N40H Introduction This report applies to mask 1N40H for these products: * KINETIS_L Errata ID 6396 Errata Title 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: 0,8,4,12,2,10,6,14,1,9,5,13,3,7,11,15 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 LCD_GCR[RVTRIM]. To avoid a low voltage on VIREG after reset, LCD_GCR[RVTRIM] must be updated during the LCD initialization routine. (c) 2014 Freescale Semiconductor, Inc. How to Reach Us: Information in this document is provided solely to enable system and software Home Page: freescale.com implementers to use Freescale products. There are no express or implied copyright Web Support: freescale.com/support information in this document. licenses granted hereunder to design or fabricate any integrated circuits based on the 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: freescale.com/SalesTermsandConditions 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. (c) 2014 Freescale Semiconductor, Inc.