PT6880 Datasheet, PDF (7/42 Pages) Princeton Technology Corp – OLED Driver/Controller IC

OLED Driver/Controller IC
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Preliminary
PT6880
Functional Description
Registers
PT6880 provides two types of 8-bit registers, namely: Instruction Register (IR) and Data Register (DR).
The register is selected using the RS Pin. When the RS pin is set to "0", the Instruction Register Type is
selected. When RS pin is set to "1", the Data Register Type is selected. Please refer to the table below.
RS R/WB Operation
0
0 Instruction Register Write as an Internal Operation.
0
1 Read Busy Flag (DB7) and Address Counter (DB0 to DB6)
1
0 Data Register Write as an Internal Operation (DR to DDRAM or CGRAM)
1
1 Data Register Read as an Internal Operation (DDRAM or CGRAM to DR)
INSTRUCTION REGISTER (IR)
The Instruction Register is used to store the instruction code (i.e. Display Clear, Cursor Home and
others), Display Data RAM (DDRAM) Address, and the Character Generator RAM (CGRAM)
Address. Instruction register can only be written from the MPU.
DATA REGISTER (DR)
The Data Register is used as a temporary storage for data that are going to be written into the
DDRAM or CGRAM as well as those data that are going to be read from the DDRAM or CGRAM.
BUSY FLAG (BF)
The Busy Flag is used to determine whether PT6880 is idle or internally operating. When PT6880 is
performing some internal operations, the Busy Flag is set to "1". Under this condition, the no other
instruction will not be accepted. When RS Pin is set to "0" and R/WB Pin is set to "1", the Busy Flag will
be outputted to the DB7 pin.
When PT6880 is idle or has completed its previous internal operation, the Busy Flag is set to "0". The
next instruction can now be processed or executed.
PT6880 pre 1.1
Page 7
Mar. 2002