The setting of the control bus for issuing Read Display Data command

Read-Modify-Write

When

the

Read-Modify-Write

command

is

issued,

the

SBN1661G_X

enters

into

Read-Modify-Write mode. In normal operation, when a Read Display Data command or a Write

Display Data command is issued, the content of the Column Address Register is automatically

incremented

by

one

after

the

command

operation

is

finished.

However,

during

Read-Modify-Write mode, the content of the Column Address Register is not incremented by

one after a Read Display Data command is finished; only the Write Display Data command can

make the content of the Column Address Register automatically incremented by one after the

command operation is finished.

During Read-Modify-Write mode, any other registers, except the Column Address Register, can

be modified. This command is useful when a block of the Display Data Memory needs to be

repeatedly read and updated.

Page 9 of 25