PT6520_10 Datasheet, PDF (6/21 Pages) Princeton Technology Corp – LCD Driver IC

PT6520
FUNCTION DESCRIPTION
DISPLAY COMMANDS
(Based on the 80 port MPU; the RD and WR commands differ for the 68 port MPU)
Command
RD WR A0 D7 D6 D5 D4 D3 D2 D1 D0
Function
1 Display ON/OFF
Switches the entire display ON or OFF,
1 0 0 1 0 1 0 1 1 1 0/1 regardless of the Display RAM’s data or
the internal status. *
2 Display START Line 1
0
011
0
Display START Address
(0-31)
Determines the line of RAM data to be
displayed at the display’s top line
(COM0)
3 Page Address Set
1 0 010
1 11 0
Page Sets the page of the Display RAM in the
(0-3) page address register.
4
Column (segment)
Address Set
1 0 0 0 Column address(0-79)
Sets the column address of the Display
RAM in the column address register.
5 Status Read
01 0
Read the status.
Busy 1: Busy (internal processing)
0: Ready status
0
0
0
0
ADC 1: Rightward (forward) output
0: Leftward (reverse) output
ON/OFF 1: Display OFF
0: Display ON
RESET 1: Resetting. 0: Normal
6 Write Display Data 1 0 1 Write Data
7 Read Display Data 0 1 1 Read Data
Writes the data
on the data bus
to RAM
Reads data
from the
Display RAM
onto the data
bus.
These commands
access a
previously-specified
address of the Display
RAM, after which the
column address is
incremented by one.
8 ADC Select
Used to reverse the correspondence
between the Display RAM’s column
1
0
010
1
00
0
0
0/1
address and segment driver output
ports
0: Rightward (forward)output
1: Leftward (reverse) output
Selects normal display operation or
9 Static Drive ON/OFF 1
0
010
1
00
1
0
0/1
static all-lit drive display operation.
1: Static drive (power save)*
0: Normal display operation
10 Duty Select
Selects the duty factor for driving LCD
1
0
010
1
01
0
0
0/1
cells.
1: 1/32 duty,
0: 1/16 duty
11 Read Modify Write
Increments column address counter by
1 0 0 1 1 1 0 0 0 0 0 1 when display is written.
(This is not done when data is read)
12 End
1 0 0 1 1 1 0 1 1 1 0 Cancels the Ready Modify Write mode.
13 Reset
Resets the display START line to the 1st
1
0
011
1
00
0
1
0
line in the register.
Resets the column address counter to 0
and page address to 0.
V1.9
6
July 2010