
NT7501
26
Code
Command
A0
RD
WR
D7
D6
D5
D4
D3
D2
D1
D0
Function
(1) Display ON/OFF
0
1
0
1
0
1
0
1
1
1
D
Turns on the LCD panel when
goes high, and turns it off when
goes low
Specifies the RAM display line
for COM0
Sets the display RAM page in
the Page Address register
Sets the 4 higher bits of column
address of the display RAM in
register
Sets the 4 lower bits of column
address of the display RAM in
register
Reads the status information
Writes data in the display RAM
Reads data from the display
RAM
Sets the normal relationship
between the RAM column
address and the segment driver
when low, but reverses the
relationship when high
Normal display when low, but
reverse display when high
Selects normal display (0) or
Entire Display ON (1)
Sets the LCD drive voltage bias
ratio
Increments the Column Address
counter during each writing
when high and during each
reading when low
Releases the Read-Modify-
Write
Resets the internal functions
Selects the COM output scan
direction. * Invalid data
Selects the power circuit
operation mode
Sets the V0 output voltage to
Electronic Control register
Set the static indicator On/Off
0: OFF 1: ON
Compound command of display
OFF and entire display ON
IC Test command. Do not use!
Command of test mode reset
(2) Set Display Start Line
0
1
0
0
1
Display start address
(3) Set Page Address
0
1
0
1
0
1
1
Page address
(4) Set Column Address 4
higher bits
0
1
0
0
0
0
1
Higher column address
(5) Set column Address 4
lower bits
0
1
0
0
0
0
0
Lower column address
(6) Read Status
(7) Write Display Data
0
1
0
1
1
0
Status
Write data
0
0
0
0
(8) Read Display Data
1
0
1
Read data
(9) ADC select
0
1
0
1
0
1
0
0
0
0
D
(10) Normal/Reverse
Display
(11) Entire Display
ON/OFF
0
1
0
1
0
1
0
0
1
1
D
0
1
0
1
0
1
0
0
1
0
D
(12) Set LCD Bias
0
1
0
1
0
1
0
0
0
1
D
(13) Read-Modify-Write
0
1
0
1
1
1
0
0
0
0
0
(14) End
0
1
0
1
1
1
0
1
1
1
0
(15) Reset
(16) Set Output Status
Register
0
1
0
1
1
1
0
0
0
1
0
0
1
0
1
1
0
0
D
*
*
*
(17) Set Power Control
0
1
0
0
0
1
0
1
Operation status
(18) Set Electronic
Control Register
(19) Set static indicator
On/Off
0
1
0
1
0
0
Electronic control value
0
1
0
1
0
1
0
1
1
0
D
(20) Power Save
-
-
-
-
-
-
-
-
-
-
-
(21) Test Command
(22) Test Mode Reset
0
0
1
1
0
0
1
1
1
1
1
1
1
1
*
0
*
0
*
0
*
0
Note: Do not use any other command, or system malfunction may result.