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HY5DU561622FTP-5I Datasheet(PDF) 17 Page - Hynix Semiconductor |
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HY5DU561622FTP-5I Datasheet(HTML) 17 Page - Hynix Semiconductor |
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17 / 28 page 
Rev. 1.1 / Mar. 2008 17 1HY5DU561622FTP-5I HY5DU561622FTP-4I MODE REGISTER SET (MRS) The mode register is used to store the various operating modes such as /CAS latency, addressing mode, burst length, burst type, test mode, DLL reset. The mode register is program via MRS command. This command is issued by the low signals of /RAS, /CAS, /CS, /WE and BA0. This command can be issued only when all banks are in idle state and CKE must be high at least one cycle before the Mode Register Set Command can be issued. Two cycles are required to write the data in mode register. During the the MRS cycle, any command cannot be issued. Once mode register field is determined, the information will be held until resetted by another MRS command. BA1 BA0 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 0 0 RFU DR TM CAS Latency BT Burst Length A2 A1 A0 Burst Length Sequential Interleave 000 Reserved Reserved 001 2 2 010 4 4 011 8 8 100 Reserved Reserved 101 Reserved Reserved 110 Reserved Reserved 111 Reserved Reserved A3 Burst Type 0 Sequential 1 Interleave A6 A5 A4 CAS Latency 000 Reserved 001 Reserved 010 Reserved 011 3 100 4 101 Reserved 110 Reserved 111 Reserved A7 Test Mode 0Normal 1Test A8 DLL Reset 0No 1Yes BA0 MRS Type 0MRS 1EMRS |
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