參數(shù)資料
型號： HYB25R128160C
廠商： SIEMENS AG
英文描述： 128-MBit Direct RDRAM(128 M位直接RDRAM)
中文描述： 128 - Mbit的直接的RDRAM（128米位直接的RDRAM）
文件頁數(shù)： 15/93頁
文件大?。?/td> 919K
代理商： HYB25R128160C
Data Book
15
2.00
Direct RDRAM
128/144-MBit (256K
×
16/18
×
32s)
COLM Packet to D Packet Mapping
Figure 5
shows a write operation initiated by a WR command in a COLC packet. If a subset of the
16 bytes of write data are to be written, then a COLM packet is transmitted on the COL pins a time
t
RTR
after the COLC packet containing the WR command. The M bit of the COLM packet is set to
indicate that it contains the MA and MB mask fields. Note that this COLM packet is aligned with the
COLC packet which causes the write buffer to be retired. See
Figure 17
for more details.
If all 16 bytes of the D data packet are to be written, then no further control information is required.
The packet slot that would have been used by the COLM packet (
t
RTR
after the COLC packet) is
available to be used as an COLX packet. This could be used for a PREX precharge command or for
a housekeeping command (this case is not shown). The M bit is not asserted in an COLX packet
and causes all 16 bytes of the previous WR to be written unconditionally. Note that a RD command
will never need a COLM packet, and will always be able to use the COLX packet option (a read
operation has no need for the byte-write-enable control bits).
Figure 5
also shows the mapping between the MA and MB fields of the COLM packet and bytes of
the D packet on the DQA and DQB pins. Each mask bit controls whether a byte of data is written
(= 1) or not written (= 0).
相關(guān)PDF資料
PDF描述
HYB 25M144180C 144-MBit Direct RDRAM(144 M位直接RDRAM)
HYB25R144180C 144-Mbit direct RDRAM(144 Mbit 直接 RDRAM)
HYB3116160BST-70 1M x 16-Bit Dynamic RAM 1k & 4k -Refresh
HYB3118160BST-70 1M x 16-Bit Dynamic RAM 1k & 4k -Refresh
HYB3116160BST-60 1M x 16-Bit Dynamic RAM 1k & 4k -Refresh
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HYB3116160BSJ 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:1M x 16-Bit Dynamic RAM 1k & 4k -Refresh
HYB3116160BSJ-50 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:1M x 16-Bit Dynamic RAM 1k & 4k -Refresh
HYB3116160BSJ-60 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:1M x 16-Bit Dynamic RAM 1k & 4k -Refresh
HYB3116160BSJ-70 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:1M x 16-Bit Dynamic RAM 1k & 4k -Refresh
HYB3116160BST-50 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:1M x 16-Bit Dynamic RAM 1k & 4k -Refresh
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