HM5225165B/HM5225805B/HM5225405B-75/A6/B6
Read with auto precharge to Read command interval
1. Different bank: When some banks are in the active state, the second read command (another bank) is
executed. Even when the first read with auto-precharge is a burst read that is not yet finished, the data read by
the second command is valid. The internal auto-precharge of one bank starts at the next clock of the second
command.
Read with Auto Precharge to Read Command Interval (Different bank)
CLK
Command
BS
READ A
READ
Dout
out A0
out A1
out B0
out B1
bank0
Read A
bank3
Read
CAS Latency = 3
Burst Length = 4
Note: Internal auto-precharge starts at the timing indicated by "
".
2. Same bank: The consecutive read command (the same bank) is illegal.
Write with auto precharge to Write command interval
1. Different bank: When some banks are in the active state, the second write command (another bank) is
executed. In the case of burst writes, the second write command has priority. The internal auto-precharge of
one bank starts at the next clock of the second command .
Write with Auto Precharge to Write Command Interval (Different bank)
CLK
Command
BS
WRIT A
in A0
WRIT
in B0
Din
in A1
in B1
in B2
in B3
bank0
Write A
bank3
Write
Burst Length = 4
Note: Internal auto-precharge starts at the timing indicated by "
".
2. Same bank: The consecutive write command (the same bank) is illegal.
Data Sheet E0082H10
31
ELPIDA [ ELPIDA MEMORY ]
