VIS
Preliminary
VG4632321A
524,288x32x2-Bit
CMOS Synchronous Graphic RAM
Block of Columns
(selected by A3-A7 registered
coincident with Block Write command)
Row in Bank
(selected by A0-A10,
and BS registered
coincident with BankActivate
Command)
Column Mask
on the DQ
inputs
(registered
coincident
with Block
Write Command
DSF D Q
BankActivate
CK
command
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQMO
Mask Register
(previously loaded
from corresponding
DQ inputs
MR0
MR1
MR2
MR3
MR4
MR5
MR6
MR7
Note: Only lower byte is shown. The operation is identical for other bytes.
Block-Write Masking Block Diagram
Document:
Rev.1
CR0
CR1
CR2
CR3
CR4
CR5
CR6
CR7
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