hm5264165f-75 Elpida Memory, Inc., hm5264165f-75 Datasheet - Page 32

• Manufacturer Part Number: hm5264165f-75
• Description: 64m Lvttl Interface Sdram
• Manufacturer: Elpida Memory, Inc.

HM5264165F/HM5264805F/HM5264405F-75/A60/B60
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)
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)
2. Same bank: The consecutive write command (the same bank) is illegal.
32
Command
Command
Note: Internal auto-precharge starts at the timing indicated by "
Note: Internal auto-precharge starts at the timing indicated by "
Dout
CLK
CLK
Din
BS
BS
READ A
WRIT A
bank0
Read A
bank0
Write A
in A0
Data Sheet E0135H10
in A1
READ
in B0
WRIT
bank3
Read
bank3
Write
out A0
in B1
out A1
in B2
".
".
out B0
in B3
CAS Latency = 3
Burst Length = 4
Burst Length = 4
out B1