hm5216165 Elpida Memory, Inc., hm5216165 Datasheet - Page 18

• Manufacturer Part Number: hm5216165
• Description: 16 M Lvttl Interface Sdram 512-kword ? 16-bit ? 2-bank
• Manufacturer: Elpida Memory, Inc.

HM5216165 Series
Burst Length
Write operation: Burst write or single write mode is selected by the OPCODE (A11, A10, A9, A8) of the
mode register.
Burst write
A burst write operation is enabled by setting OPCODE (A9, A8) to (0, 0). A burst write starts in the same
cycle as a write command set. (The latency of data input is 0.) The burst length can be set to 1, 2, 4, 8, and
full-page, like burst read operations. The write start address is specified by the column address (AY0 to AY7)
and the bank select address (A11) at the write command set cycle.
Command
18
Address
Command
Din
Address
Dout
CLK
CLK
BL = 1
BL = 2
BL = 4
BL = 8
BL = full page (256)
BL = 1
BL = 2
BL = 4
BL = 8
BL = full page (256)
ACTV
ACTV
Row
Row
t
t
RCD
RCD
Column
READ
Column
WRIT
in 0
in 0
in 0
in 0
in 0
in 1
in 1
in 1
in 1
out 0
out 0 out 1 out 2 out 3
out 0 out 1 out 2 out 3
out 0 out 1
out 0 out 1 out 2 out 3
Data Sheet E0167H10
in 2
in 2
in 2
in 3
in 3
in 3
in 4
in 4
in 5
in 5
out 4 out 5
out 4 out 5
in 6
in 6
out 6 out 7
out 6 out 7
in 7
in 7
in 8
out 8
CAS latency = 1, 2, 3
in 255
out 255
BL: Burst length
CAS latency = 2
in 0
out 0 out 1
in 1