The Marvell 88i8945P-TFJ2 is a hard disk drive system-on-chip. This device was found in a Western Digital desktop internal hard disk drive (HDD). The Marvell 88i8945P-TFJ2 is a multichip package containing two dies. This circuit analysis report presents the following major functional blocks of the DDR memory controller interface: I/O Cell, Delay Locked Loop, Voltage Generator and Reference Circuits, DQ and LDQS Input Paths.