PT6880 datasheet(16/42 Pages) PTC

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OLED Driver/Controller IC

Preliminary

PT6880

C = "0" : Cursor OFF

B = "0" : Blinking OFF

4. Entry Mode Set:

I/D = "1" : Increment by 1

S = "0" : No Shift

The Busy Flag (BF) is in a busy state until the initialization is completed (BF="1"). The busy state

will be in effect 10 ms after the VDD rises to 4.5 Volts.

Please note that in order for the initialization by internal reset circuit to be successful, the electrical

characteristic conditions listed in the Electrical Characteristics Section must be complied with.

Otherwise, such initialization must be performed by instruction from the MPU.

Instructions

PT6880's Instruction Register (IR) and Data Register (DR) are the only registers that can be controlled by

the MPU. Prior to the commencement of it internal operation, PT6880 temporarily stores the control

information to its Instruction Register (IR) and Data Register (DR) in order to easily facilitate interface

with various types of MPU. The internal operation of the PT6880 are determined by the signals (RS,

R/WB, DB0 to DB7) that are sent from the MPU. These signals are categorized into 4 instructions types,

namely:

Function Setting Instructions (i.e. Display, Format, Data Length etc.)

Internal RAM Address Setting Instructions

Data Transfer with Internal RAM Instructions

Miscellaneous Function Instructions

The generally used instructions are those that execute data transfers with the internal RAM. However,

when the internal RAM addresses are auto incremented/decremented by 1 after each Data Write, the

program load of the MPU is lightened. The Display Shift Instruction can be executed at the same time as

the Display Data Write, thereby minimizing system development time with maximum programming

efficiency.

When an instruction is being executed for an internal operation, only the Busy Flag/Address Read

Instruction can be performed. The other instructions are not valid. It should be noted that during the

execution of an instruction, the Busy Flag is set to "1". The Busy Flag is set to "0" when the instructions

are can be accepted and executed. Therefore, the Busy Flag should be checked to make certain that BF =

"0" before sending another instruction from the MPU. If not, the time between the first instruction and the

next instruction is longer than the time it takes to execute the instruction itself.

Instruction

Code

Description

Max.

Execution

Time when

PT6880 pre 1.1

Page 16

Mar. 2002

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