A45L9332AE AMICC [AMIC Technology], A45L9332AE Datasheet - Page 20

• Manufacturer Part Number: A45L9332AE
• Description: 256K X 32 Bit X 2 Banks Synchronous Graphic RAM
• Manufacturer: AMICC [AMIC Technology]

2. DQM Operation
PRELIMINARY
* Note :
DQ(CL2)
DQ(CL3)
DQMi
DQ(CL2)
CMD
DQ(CL3)
CLK
CMD
CKE
CLK
DQM
1) Write Mask (BL=4)
1. There are 4 DQMi (I=0~3).
RD
2. DQM makes data out Hi-Z after 2 clocks which should masked by CKE “L”.
2) Read Mask (BL=4)
WR
D0
D0
Each DQMi masks 8 DQi’s. (1 Byte, 1 Pixel for 8bbp).
DQM to Data-in Mask = 0CLK
(October, 2001, Version 0.1)
D1
D1
Masked by CKE
Q0
D3
D3
Hi-Z
Hi-Z
Q1
Q2
2) Read Mask (BL=4)
RD
19
Hi-Z
Hi-Z
Q4
Q3
Q0
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Masked by CKE
Q1
Q1
DQM to Data-out Mask = 2
Q6
Q5
Q2
Q3
AMIC Technology, Inc.
A45L9332A Series
Q7
Q6
Q3
Q8
Q7