Pin assignment for 4 x 40 SANYO display

This page discribes the pinout of the Tottori Sanyo LCM54451RZ 4 line by 40 character display currently sold by MPJA as item #12295 OP. Please note that this pinout is NOT an industry standard. It was found by tracing the circuit board of the LCD display and correlating pins on the HD44780 with pins on the connector. I have tested the display, and found that it works in both 4-bit and 8-bit mode as expected. All power, data and control lines are connected to both chips excepting the enable control lines. These are seperate signals for the seperate HD44780s, one which controls the upper two lines of the display, the other controlling the lower two lines of the display. I could not find any data on these displays, and am assuming the specifications are similar to other HD44780 controlled LCD displays.

Pictures of the display can be seen by following the links below:
*(The medium resolution is just enough to read the chip IDs)*
See NOTE below	Medium resolution, ~126K JPEG High Resolution, ~1.18MB GIF
	Medium resolution, ~178K JPEG High Resolution, ~1.21MB GIF

Legend:
	=	Power connections
	=	Control lines
	=	Data bus
	=	Don't Care

Legend:

Power connections

Control lines

Data bus

Don't Care

Sorted by **PIN NUMBER**
Pin	Symbol	Level	I/O	Function	Interface
Idle	Active	4-bit	8-bit
1	DB6		0/1	I/O	Data bus line 6
2	DB7		0/1	I/O	Data bus line 7 (MSB)
3	DB4		0/1	I/O	Data bus line 4
4	DB5		0/1	I/O	Data bus line 5
5	DB3		0/1	I/O	Data bus line 3
6	DB2		0/1	I/O	Data bus line 2
7	DB0		0/1	I/O	Data bus line 0 (LSB)
8	DB1		0/1	I/O	Data bus line 1
9	E1		1->0	I	Enable signal row 0 & 1
10	E2		1->0	I	Enable signal row 2 & 3
11	RS	1	0/1	I	0 = Instruction input 1 = Data input
12	R/W	1	0/1	I	0 = Write to LCD module 1 = Read from LCD module
13	Vee	0 to -5 VDC	-	LCD Voltage [0 to -5 VDC] (Contrast adjust) I've found -3 VDC to be optimal.
14	Vcc	5 VDC +/- 5%	-	Power supply (+5V)
15	Vss	0	-	Power supply (GND)
16	Vss	0	-	Power supply (GND)

Sorted by PIN NUMBER

Symbol

Level

I/O

Function

Interface

Idle

Active

4-bit

8-bit

DB6

0/1

I/O

Data bus line 6

DB7

0/1

I/O

Data bus line 7 (MSB)

DB4

0/1

I/O

Data bus line 4

DB5

0/1

I/O

Data bus line 5

DB3

0/1

I/O

Data bus line 3

DB2

0/1

I/O

Data bus line 2

DB0

0/1

I/O

Data bus line 0 (LSB)

DB1

0/1

I/O

Data bus line 1

1->0

Enable signal row 0 & 1

1->0

Enable signal row 2 & 3

0/1

0 = Instruction input
1 = Data input

R/W

0/1

0 = Write to LCD module
1 = Read from LCD module

Vee

0 to -5 VDC

LCD Voltage [0 to -5 VDC] (Contrast adjust)
I've found -3 VDC to be optimal.

Vcc

5 VDC +/- 5%

Power supply (+5V)

Vss

Power supply (GND)

Vss

Power supply (GND)

Sorted by **PIN FUNCTION**
Symbol	Pin	Level	I/O	Function	Interface
Idle	Active	4-bit	8-bit
Vss	15	0	-	Power supply (GND)
Vss	16	0	-	Power supply (GND)
Vcc	14	5 VDC +/- 5%	-	Power supply (+5V)
Vee	13	0 to -5 VDC	-	LCD Voltage [0 to -5 VDC] (Contrast adjust) I've found -3 VDC to be optimal.
E1	9	1	1->0	I	Enable signal row 0 & 1
E2	10	1	1->0	I	Enable signal row 2 & 3
RS	11		0/1	I	0 = Instruction input 1 = Data input
R/W	12		0/1	I	0 = Write to LCD module 1 = Read from LCD module
DB0	7		0/1	I/O	Data bus line 0 (LSB)
DB1	8		0/1	I/O	Data bus line 1
DB2	6		0/1	I/O	Data bus line 2
DB3	5		0/1	I/O	Data bus line 3
DB4	3		0/1	I/O	Data bus line 4
DB5	4		0/1	I/O	Data bus line 5
DB6	1		0/1	I/O	Data bus line 6
DB7	2		0/1	I/O	Data bus line 7 (MSB)

Sorted by PIN FUNCTION

Symbol

Level

I/O

Function

Interface

Idle

Active

4-bit

8-bit

Vss

Power supply (GND)

Vss

Power supply (GND)

Vcc

5 VDC +/- 5%

Power supply (+5V)

Vee

0 to -5 VDC

LCD Voltage [0 to -5 VDC] (Contrast adjust)
I've found -3 VDC to be optimal.

1->0

Enable signal row 0 & 1

1->0

Enable signal row 2 & 3

0/1

0 = Instruction input
1 = Data input

R/W

0/1

0 = Write to LCD module
1 = Read from LCD module

DB0

0/1

I/O

Data bus line 0 (LSB)

DB1

0/1

I/O

Data bus line 1

DB2

0/1

I/O

Data bus line 2

DB3

0/1

I/O

Data bus line 3

DB4

0/1

I/O

Data bus line 4

DB5

0/1

I/O

Data bus line 5

DB6

0/1

I/O

Data bus line 6

DB7

0/1

I/O

Data bus line 7 (MSB)

NOTE: The scans of the LCD are not perfect, notably: I did not remove the plastic covering from the display face, which caused the white 'quarter moon' on the right of the display. My scanner is away from my work area, so I had to connect a portable power supply, and disconnect other connections before scanning. During this switch, the lower display shifted (I must've been shaking the display too hard...;-)