My request is missed.
What is located in Boot-ROM memory?
Whether it is possible to realize bootloader through boot-ROM? or there is other way?
This question about MB96690 Series.
The BootROM protocol is described here: http://www.cypress.com/file/243981/download
For MB966xx devices the protocol is slightly different, see 6.2.2 of the document mentioned above:
MB96300: 0x00 0x55 0x87 0x00 0x78
MB96600: 0x00 0x55 0x00 0x87 0x00 0x78
It allows to program 'new/erase' device via serial interface.