km4132g271a ETC-unknow, km4132g271a Datasheet - Page 18

• Manufacturer Part Number: km4132g271a
• Description: 128k 32bit Banks Synchronous Graphic
• Manufacturer: ETC-unknow

KM4132G271A
2. DQM Operation
*Note :
DQ(CL2)
DQ(CL3)
3) DQM with Clock Suspended (Full Page Read)
DQ(CL2)
DQ(CL3)
CMD
DQM
CMD
DQMi
Note 1
CKE
1. There are 4 DQMi(i=0~3).
2. DQM makes data out Hi-Z after 2 clocks which should masked by CKE " L".
CLK
CLK
Each DQMi masks 8 DQi's.(1 Byte, 1 Pixel for 8 bpp)
1) Write Mask (BL=4)
RD
WR
D
D
0
0
DQM to Data-in Mask = 0CLK
D
D
1
1
Q
0
Masked by DQM
D
D
3
3
Hi-Z
Hi-Z
Note2
Q
Q
2
1
Hi-Z
Hi-Z
2) Read Mask (BL=4)
RD
Q
Q
4
3
Hi-Z
Hi-Z
Q
0
Hi-Z
Hi-Z
Q
Q
Masked by DQM
6
5
DQM to Data-out Mask = 2CLK
Q
Q
Q
Q
2
1
Rev.0 (August 1997)
7
6
Q
Q
CMOS SGRAM
Q
Q
3
2
8
7
Q
3