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HM534253BJ-8 参数 Datasheet PDF下载

HM534253BJ-8图片预览
型号: HM534253BJ-8
PDF下载: 下载PDF文件 查看货源
内容描述: 1M的VRAM ( 256千字×4位) [1 M VRAM (256-kword x 4-bit)]
分类和应用: 存储内存集成电路
文件页数/大小: 45 页 / 448 K
品牌: ELPIDA [ ELPIDA MEMORY ]
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Description
Features
HM534253B Series
1 M VRAM (256-kword
×
4-bit)
E0165H10 (Ver. 1.0)
(Previous ADE-203-204D (Z))
Jul. 6, 2001 (K)
The HM534253B is a 1-Mbit multiport video RAM equipped with a 256-kword
×
4-bit dynamic RAM and a
512-word
×
4-bit SAM (serial access memory). Its RAM and SAM operate independently and
asynchronously. It can transfer data between RAM and SAM. In addition, it has two modes to realize fast
writing in RAM. Block write and flash write modes clear the data of 4-word
×
4-bit and the data of one row
(512-word
×
4-bit) respectively in one cycle of RAM. And the HM534253B makes split transfer cycle
possible by dividing SAM into two split buffers equipped with 256-word
×
4-bit each. This cycle can transfer
data to SAM which is not active, and enables a continuous serial access.
Multiport organization
Asynchronous and simultaneous operation of RAM and SAM capability
RAM: 256-kword
×
4-bit
SAM: 512-word
×
4-bit
Access time
RAM: 60 ns/70 ns/80 ns/100 ns max
SAM: 20 ns/22 ns/25 ns/25 ns max
Cycle time
RAM: 125 ns/135 ns/150 ns/180 ns min
SAM: 25 ns/25 ns/30 ns/30 ns min
Low power
Active
RAM: 413 mW max
SAM: 275 mW max
Standby 38.5 mW max
High-speed page mode capability
Mask write mode capability
Bidirectional data transfer cycle between RAM and SAM capability
Split transfer cycle capability
Elpida Memory, Inc. is a joint venture DRAM company of NEC Corporation and Hitachi, Ltd.
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