MSM5718C50-60GS-K Ver la hoja de datos (PDF) - Oki Electric Industry
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MSM5718C50-60GS-K Datasheet PDF : 46 Pages
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¡ Semiconductor
MSM5718C50/MD5764802
BASIC OPERATION
Figure 4 (a) shows an example of a read transaction. A transaction begins in interval T0 with the
transfer of a REQ packet. The REQ packet contains the command (ACTV/READ), a device, bank,
and row address (BNK/ROW) of the page to be activated, and the column address (COLa) of the first
octbyte to be read from the page.
The selected bank performs the activation of the selected row during T1 and T2 (the tRCD interval).
Next, the selected bank reads the selected octbyte during T3 and T4 (the tCAC interval). A second
command RSTRB (read strobe) is transferred during T3 and causes the first octbyte (DOUTa) to be
transferred during T5.
CLK
(RX/TXCLK)
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
ADDRESS
(BUSENABLE)
COL b COL c COL d
COMMAND
(BUSCTRL)
DQ8,..DQ0
(BUSDATA[8:0])
ACTV
/READ
REQ
Packet
BNK/ROW
/COL a
RSTRB
RTERM
Next
REQ
DOUT a DOUT b DOUT c DOUT d
Bank Operation
tRCD
tCAC
(a) BANK ACTIVATE AND RANDOM READ CYCLES WITHIN A PAGE
CLK
(RX/TXCLK)
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
ADDRESS
(BUSENABLE)
COL b COL c COL d
COMMAND
(BUSCTRL)
DQ8,..DQ0
(BUSDATA[8:0])
ACTV
/WRITE
REQ
Packet
BNK/ROW
/COL a
Bank Operation
WSTRB
WTERM
Next
REQ
DIN a DIN b DIN c DIN d
tRCD
(b) BANK ACTIVATE AND RANDOM WRITE CYCLES WITHIN A PAGE
Fig. 4 Read and Write Transaction Examples
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