MH32D72KLH-75 Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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MH32D72KLH-75

2,415,919,104-BIT (33,554,432-WORD BY 72-BIT) Double Data Rate Synchronous DRAM Module

MITSUBISHI ELECTRIC  

Preliminary Spec.

Some contents are subject to change without notice.

MITSUBISHI LSIs

MH32D72KLH-75,-10

2,415,919,104-BIT (33,554,432-WORD BY 72-BIT) Double Data Rate Synchronous DRAM Module

BASIC FUNCTIONS

The MH32D72KLH provides basic functions, bank (row) activate, burst read / write, bank (row)

precharge, and auto / self refresh. Each command is defined by control signals of /RAS, /CAS

and /WE at CLK rising edge. In addition to 3 signals, /S0 ,CKE0 and A10 are used as chip

select, refresh option, and precharge option, respectively. To know the detailed definition of

commands, please see the command truth table.

/CK0

CK0

/S0

/RAS

/CAS

/WE

CKE0

A10

Chip Select : L=select, H=deselect

Command

Command

Command

def ine basic commands

Ref resh Option @ref resh command

Precharge Option @precharge or read/write command

Activate (ACT) [/RAS =L, /CAS =/WE =H]

ACT command activates a row in an idle bank indicated by BA.

Read (READ) [/RAS =H, /CAS =L, /WE =H]

READ command starts burst read from the active bank indicated by BA. First output data

appears after /CAS latency. When A10 =H at this command, the bank is deactivated after the

burst read (auto-precharge,READA)

Write (WRITE) [/RAS =H, /CAS =/WE =L]

WRITE command starts burst write to the active bank indicated by BA. Total data length to be

written is set by burst length. When A10 =H at this command, the bank is deactivated after

the burst write (auto-precharge, WRITEA).

Precharge (PRE) [/RAS =L, /CAS =H, /WE =L]

PRE command deactivates the active bank indicated by BA. This command also terminates

burst read /write operation. When A10 =H at this command, all banks are deactivated

(precharge all, PREA).

Auto-Refresh (REFA) [/RAS =/CAS =L, /WE =CKE0 =H]

REFA command starts auto-refresh cycle. Refresh address including bank address are

generated internally. After this command, the banks are precharged automatically.

MIT-DS-0391-1.0

MITSUBISHI ELECTRIC

24.Nov.2000

5

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