Hi Hari123pass123
Please note LPC2148 is not in longevity program since Jun 2021. We no longer recommend it for new design. Therefor the material and support for this device is very limited.
There is AN10406 Accessing SD/MMC card using SPI on LPC2000
https://www.nxp.com.cn/docs/en/application-note/AN10406.pdf
and on my disk I found a TN on LPC2xxx SPI master code example. I attach it.
Besides we don't have other material on it.
Please note. If you start new design, we don't suggest LPC2xxx. Please consider LPC or imxRT.
Have a nice day,
Jun Zhang
