tc59ym916bkg24a ETC-unknow, tc59ym916bkg24a Datasheet - Page 15

• Manufacturer Part Number: tc59ym916bkg24a
• Description: The Second Generation 512-megabit Xdrtm Dram
• Manufacturer: ETC-unknow

horizontal axis at the top of the table. Each request includes a bank specification “Ba” and “Bb”. The first and
second banks may be the same, or they may be different. These two sub cases for each interaction are shown along
the vertical axis on the left.
and “y” are one of the four operation types (“A” for Activate, “R” for Read, “W” for Write, or “P” for Precharge) for
the first and second request, respectively, and “z” indicates the same bank (“s”) or different bank (“d”).
7). Each figure illustrates the eight cases in the corresponding vertical column. Thus, Figure 4 shows the eight
cases when the second request is an activate operation (“A”). In the following discussion of the cases, only those in
which the interaction interval is greater than t
Request Interactions Cases
minimum interval between activate commands to different banks of a device.
interval between activate commands to same banks of a device. A precharge operation must be inserted between
the two activate operations.
and activate operation. The minimum interval between a read and a precharge operation to a bank is t
minimum interval between a precharge and an activate operation to a bank is t
read and the activate operation. The minimum interval between a write and a precharge operation to a bank is
t
operation to a bank is t
and represents the minimum interval between an activate operation and a read operation to a bank.
represents the minimum interval between two read operations.
represents the minimum interval between a write and a read operation to any banks. See “Read/Write Interaction”
on page 28.
precharge and the read operation. The minimum interval between a precharge and an activate operation to a bank
is t
parameter and represents the minimum interval between an activate operation and a write operation to a bank.
represents the minimum interval between a read and a write operation to any banks. See “Read/Write Interaction”
on page 28.
represents the minimum interval between two write operations.
precharge and the write operation. The minimum interval between a precharge and an activate operation to a bank
is t
- precharge time to a bank.
write-to-precharge time parameters to a bank.
minimum interval between precharge commands to different banks of a device.
between precharge commands to same banks of a device. An activate operation must be inserted between the two
activate operations. This activate operation must be placed a time t
second precharge.
WRP
The first request is shown along the vertical axis on the left of the table. The second request is shown along the
There are 32 possible interaction cases altogether. The table gives each case a label of the form “xyz”, where “x”
Along the horizontal axis at the bottom of the table are cross-references to four figures (Figure 4 through Figure
In Figure 4, the interaction interval for the AAd case is t
The interaction interval for the AAs case is t
The interaction interval for the RAs case is t
The interaction interval for the WAs case is t
The interaction interval for the PAs case is t
In Figure 5, the interaction interval for the ARs case is t
The interaction interval for the RRd and RRs cases is t
The interaction interval for the WRd and WRs cases is t∆
The interaction interval for the PRs case is t
In Figure 6, the interaction interval for the AWs case is t
The interaction interval for the RWd and RWs cases is t∆
The interaction interval for the WWd and WWs cases is t
The interaction interval for the PWs case is t
In Figure 7, the interaction interval for the APs case is t
The interaction intervals for the RPs and WPs cases are t
The interaction interval for the PPd case is t
The interaction interval for the PPs case is t
RP
RP
. The minimum interval between a precharge and an activate operation to a bank is t
. The minimum interval between an activate and read operation to a bank is t
. The minimum interval between an activate and a write operation to a bank is t
RP
.
RP
RP
RC
RC
WRP
PP
CYCLE
WRP
RP
TC59YM916BKG24A,32A,32B,40B,32C,40C
. The minimum interval between a precharge and an activate
. This parameter is the precharge-to-precharge time and the
. This is the row cycle time parameter and the minimum interval
. This is the row cycle time parameter and is the minimum
+ t
+ t
+ t
+ t
RCD-R
RCD-W
will be described.
RP
RP
CC
. A precharge operation must be inserted between the read
. A precharge operation must be inserted between the
RAS
RCD-R
RR
. An activate operation must be inserted between the
RCD-W
CC
WR
RW
RDP
. This is the column-to-column time parameter and
. An activate operation must be inserted between the
. This parameter is the row-to-row time and is the
. This is the column-to-column time parameter and
. This parameter is the minimum activate – to
. This is the write-to-read time parameter and
. This is the read-to-write time parameter and
and t
. This is the row-to-column-read time parameter
. This is the row-to-column-write timing
RP
WRD
after the first, and a time t
, respectively. These are the read- or
RP
.
RCD-R
RCD-W
.
RP
2004-12-15 15/76
.
.
RAS
before the
RDP
Rev 0.1
. The