ISP on Nand flash chips and other large sized chips cannot be supported. If you want to request ISP programming support on a chip, please first check the datasheet of the device for checking if ISP is supported on it or not. Some IC manufacturers indicate whether this chip has ISP function or not in the name of the chip. For example, some manufacturers use NIS to indicate the device doesn’t support ISP function while use IS to indicate the device does. The letter F in the middle stands for Flash and those chips cannot be supported.
Also, the device has to be designed to be able to program serially. Most large size Eprom and flash devices are designed to program parallel only. Devices most commonly supporting serial programming are serial E(E) proms, MCUs, and PLDs. The Circuit on the PCB has to be designed to be able to program serially. Serial Input, Serial Output, clock, Ground, Power pins, etc. should be accessible from outside. For requesting a device update, please refer here: