參數(shù)資料
型號(hào): HM5225805B
廠商: Hitachi,Ltd.
英文描述: 256M LVTTL interface SDRAM(256M LVTTL接口同步DRAM)
中文描述: 256M LVTTL接口的SDRAM(256M LVTTL接口同步的DRAM)
文件頁(yè)數(shù): 24/64頁(yè)
文件大小: 802K
代理商: HM5225805B
HM5225165B/HM5225805B/HM5225405B-75/A6/B6
24
Write operation:
Burst write or single write mode is selected by the OPCODE (BA1, BA0, A12, A11, A10,
A9, A8) of the mode register.
1. Burst write:
A burst write operation is enabled by setting OPCODE (A9, A8) to (0, 0). A burst write
starts in the same clock as a write command set. (The latency of data input is 0 clock.) The burst length can
be set to 1, 2, 4 and 8, like burst read operations. The write start address is specified by the column address
and the bank select address (BA0/BA1) at the write command set cycle.
WRIT
CLK
Command
Din
ACTV
Row
Column
in 0
in 6
in 7
Address
in 1
in 4
in 5
in 3
BL = 1
BL = 2
BL = 4
BL = 8
t
RCD
in 0
in 0
in 0
in 1
in 1
in 2
in 2
in 3
CAS
Latency = 2, 3
2. Single write:
A single write operation is enabled by setting OPCODE (A9, A8) to (1, 0). In a single write
operation, data is only written to the column address and the bank select address (BA0/BA1) specified by the
write command set cycle without regard to the burst length setting. (The latency of data input is 0 clock).
WRIT
CLK
Command
Din
ACTV
Row
Column
in 0
Address
t
RCD
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HM5225805B-75 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank /16-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5225805B-A6 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank /16-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5225805B-B6 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank /16-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5225805BLTT-75 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank /16-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5225805BLTT-A6 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank /16-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM