AnsweredAssumed Answered

K70 and display without SDRAM

Question asked by wf wf on Jun 1, 2016
Latest reply on Aug 18, 2016 by Carlos_Mendoza


I'm using a k70 processor to drive a 480x272 px tft display. The customized board used doesn't have any external SDRAM memory but only a 1Gb NAND connected with NandFlashController module. Actually I have a MK70FN1M0VMJ12 without FlexNVM or EEPROM/FlexRAM. The first question is: may I use the NAND as a slower SDRAM, addressing the image directly on it, even reducing the 1Gb size??

How does it work without a SDRAM module?

Suppose I could change the MK70FN1M0VMJ12 in the version with FlexNVM, would this help me somehow? let's imagine a 200kB code beween Bootloader and FW, so I could use the whole 512kB FlexNVM to store a complete image.


The second question concerns how to drive a tft display that has not HSYNC and VSYNC signals (see attached datasheet). The sincronization is probably made by driving the DateEnable (also OE) pin LOW during the HSYNC and VSYNC time. I found a method under PE  LCDC_PDD_SetLSCLKDuringSYNC(LCDC_BASE_PTR, LCDC_PDD_ALWAYS_ON); to be substituted with LCDC_PDD_SetLSCLKDuringSYNC(LCDC_BASE_PTR, LCDC_PDD_ALWAYS_OFF).

This doesn't work alone, is it necessary to modify elsewhere some parameter? any hint?


thank you