m5m4v4s40ctp-12 Mitsumi Electronics, Corp., m5m4v4s40ctp-12 Datasheet - Page 4

• Manufacturer Part Number: m5m4v4s40ctp-12
• Description: 2-bank 131072-word 16-bit Synchronous Dram
• Manufacturer: Mitsumi Electronics, Corp.

SDRAM (Rev. 0.3)
(row) precharge, and auto/self refresh. Each command is defined by the control signals (/RAS, /CAS and
/WE) at the rising edge of CLK. The inputs /CS ,CKE and A8 are used for chip select, refresh options, and
precharge options, respectively.
BASIC FUNCTIONS
Activate (ACT) [/RAS =L, /CAS =/WE =H]
the two banks will be activated.
Read (READ) [/RAS =H, /CAS =L, /WE =H]
appears after /CAS latency. If A8 =H when READ is issued the bank is automatically precharged after
the last burst read (READA). Note: READA is not valid for FP burst operations.
Write (WRITE) [/RAS =H, /CAS =/WE =L]
written is set by burst length. If A8 =H when WRITE is issued the bank is automatically precharged
after the last burst write (WRITEA). Note: WRITEA is not valid for FP burst operations.
Precharge (PRE) [/RAS =L, /CAS =H, /WE =L]
read and write operations. If A8 =H when PRE is issued both banks are automatically precharged (PREA).
Auto-Refresh (REFA) [/RAS =/CAS =L, /WE =CKE =H]
generated internally. After this command, the banks are precharged automatically.
Feb ‘97 Preliminary
Please see the command truth table for detailed definitions.
The M5M4V4S40CTP has the following basic functions, bank (row) activate, burst read/write, bank
The PRE command deactivates the active bank indicated by BA. This command also terminates burst
The REFA command starts an auto-refresh cycle. The refresh address, including the bank address, is
The ACT command activates a row in an idle bank. The bank address, BA, is used to select which of
The READ command starts burst read from the active bank indicated by BA. The first output data
The WRITE command starts burst write to the active bank indicated by BA. Total data length to be
4M (2-BANK x 131072-WORD x 16-BIT) Synchronous DRAM
CLK
/CS
/RAS
/CAS
/WE
CKE
A8
MITSUBISHI ELECTRIC
M5M4V4S40CTP-12, -15
Chip Select : L=select, H=deselect
Command
Command
Command
Refresh Option @refresh command
Precharge Option @precharge or read/write command
define basic commands
MITSUBISHI LSIs
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