512MBit MOBILE SDR SDRAMs based on 4M x 4Bank x32 .
Hynix Semiconductor
H55S5122EFR-60M - 512Mbit (16Mx32bit) Mobile SDR Memory
512MBit MOBILE SDR SDRAMs based on 4M x 4Bank x32 I/O Specification of 512M (16Mx32bit) Mobile SDRAM Memory Cell Array - Organized as 4banks of 4,19.