Intel 740 User Manual

PC SGRAM Specification
16
Revision 0.9
7.8 Block Write
The Block Write command is used to write a block of data to an active row and bank within the
device. The Block Write command is issued by driving CS# low, RAS# high, CAS# low, WE# low
and DSF high. A Block Write command is a non-burst write command that writes data to 8
columns simultaneously. The data value contained in the Color Register (CR) is written to eight
consecutive column locations addressed by A[7:3].
A Block Write access requires a minimum time of T
BWC
to execute. No new commands can be
executed until T
WBC
is met except for Activate and Precharge command to the other banks.
7.9 Mode Register Set
This command is used to program the SGRAM for the desired operating mode. This command
should be used after power up as defined in the power up sequence before the actual operation of
the SGRAM is initiated. The functionality of the SGRAM device can be altered by re-
programming the mode register through the execution of Mode Register Set command. All the
banks should be precharged (i.e., in idle state) before the MRS command can be issued.
Figure 4. Mode Register Set Command
tRP 2 CLKtRP 2 CLK
Pre MSR Wr
MSR Data
Act
Row
Mode Register Write (msrwr.td)
CLK
CLK#
CMD
Addr
CS#

Intel 740 Specifications

General

Brand	Intel
Model	740
Category	Video Card
Language	English