SDRAM (Rev. 1.0E)
Jun. '99
MITSUBISHI LSIs
M2V28S20TP-6,-7,-8
M2V28S30TP-6,-7,-7L,-8,-8L
M2V28S40TP-7,-7L,-8,-8L
128M Synchronous DRAM
(4-BANK x 8,388,608-WORD x 4-BIT)
(4-BANK x 4,194,304-WORD x 8-BIT)
(4-BANK x 2,097,152-WORD x 16-BIT)
AUTO REFRESH
Single cycle of auto-refresh is initiated with a REFA (/CS= /RAS= /CAS= L, /WE= /CKE= H)
command. The refresh address is generated internally. 4096 REFA cycles within 64ms refresh
128Mbit memory cells. The auto-refresh is performed on 4 banks concurrently. Before performing an
auto-refresh, all banks must be in the idle state. Auto-refresh to auto-refresh interval is minimum tRC.
Any command must not be supplied to the device before tRC from the REFA command.
CLK
/CS
/RAS
/CAS
/WE
CKE
A0-11
BA0,1
Auto-Refresh
NOP or DESELECT
minimum tRC
Auto Refresh on All Banks
Auto Refresh on All Banks
MITSUBISHI ELECTRIC
25