參數(shù)資料
型號(hào): M2V64S40BTP-10L
廠商: Mitsubishi Electric Corporation
英文描述: 64M bit Synchronous DRAM
中文描述: 6400位同步DRAM
文件頁數(shù): 16/52頁
文件大?。?/td> 674K
代理商: M2V64S40BTP-10L
Apr. '99
MITSUBISHI LSIs
MITSUBISHI ELECTRIC
SDRAM (Rev.1.2)
M2V64S20BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 4194304-WORD x 4-BIT)
M2V64S30BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 2097152-WORD x 8-BIT)
M2V64S40BTP-7,-7L,-8,-8L,-8A,-10,-10L (4-BANK x 1048576-WORD x 16-BIT)
64M bit Synchronous DRAM
16
OPERATIONAL DESCRIPTION
BANK ACTIVATE
The SDRAM has four independent banks. Each bank is activated by the ACT command with
the bank addresses (BA0,1). A row is indicated by the row addresses A11-0. The minimum
activation interval between one bank and the other bank is tRRD.The number of banks which
are active concurrently is not limited.
PRECHARGE
The PRE command deactivates the bank indicated by BA0,1. When multiple banks are active,
the precharge all command (PREA, PRE + A10=H) is available to deactivate them at the same
time. After tRP from the precharge, an ACT command to the same bank can be issued.
READ
After tRCD from the bank activation, a READ command can be issued. 1st output data is
available after the /CAS Latency from the READ, followed by (BL -1) consecutive data when the
Burst Length is BL. The start address is specified by A9-0(x4), A8-0(x8), A7-0(X16), and the
address sequence of burst data is defined by the Burst Type. A READ command may be
applied to any active bank, so the row precharge time (tRP) can be hidden behind continuous
output data by interleaving the multiple banks. When A10 is high at a READ command, the auto-
precharge (READA) is performed. Any command (READ, WRITE, PRE, ACT) to the same bank
is inhibited till the internal precharge is complete. The internal precharge starts at BL after
READA. The next ACT command can be issued after (BL + tRP) from the previous READA.
Command
Bank Activation and Precharge All (BL=4, CL=3)
CLK
A0-9
A10
BA0,1
DQ
ACT
Xa
Xa
00
READ
Y
0
00
Qa0
Qa1
Qa2
Qa3
ACT
Xb
Xb
01
PRE
tRRD
tRCD
1
ACT
Xb
Xb
01
Precharge all
tRAS
tRP
tRCmin
A11
Xa
Xb
Xb
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