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MH32D72AKLB-75 Datasheet(PDF) 5 Page - Mitsubishi Electric Semiconductor |
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MH32D72AKLB-75 Datasheet(HTML) 5 Page - Mitsubishi Electric Semiconductor |
5 / 40 page MITSUBISHI LSIs MITSUBISHI ELECTRIC MH32D72AKLB-75,-10 2,415,919,104-BIT (33,554,432-WORD BY 72-BIT) Double Data Rate Synchronous DRAM Module MIT-DS-0399-0.2 21.Mar.2001 Preliminary Spec. Some contents are subject to change without notice. 5 BASIC FUNCTIONS The MH32D72AKLB 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(/S1) ,CKE0(CKE1) 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. /S0, /S1 Chip Select : L=select, H=deselect /RAS Command /CAS Command /WE Command CKE0, CKE1 Ref resh Option @ref resh command A10 Precharge Option @precharge or read/write command CK0 def ine basic commands 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. Firs t 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(CKE1) =H] REFA command starts auto-refresh cycle. Refresh address including bank address are generated internally. After this command, the banks are precharged automatically. /CK0 |
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