Epson SED1278F/D manual Pin Configuration, Pin Description, Absolute Maximum Ratings

SED1278F/D

PIN CONFIGURATION

QFP5-80pin

SEG38

SEG37

SEG36

SEG35

SEG34

SEG33

SEG32

SEG31

SEG30

SEG29

SEG28

SEG27

SEG26

SEG25

SEG24

SEG23

SEG39 SEG40	COM16	COM15	COM14	COM13	COM12 COM11 COM10 COM9 COM8		COM7 COM6 COM5 COM4 COM3 COM2	COM1 DB7 DB6 DB5 DB4 DB3 DB2
65			60		55		50	45	40
70									35
						SED1278F
75			INDEX						30
80			5		10		15	20	25
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SEG22 SEG21	SEG20	SEG19	SEG18	SEG17	SEG16 SEG15 SEG14 SEG13 SEG12		SEG11 SEG10 SEG9 SEG8 SEG7 SEG6	SEG5 SEG4 SEG3 SEG2 SEG1	VSS OSC1

DB1

DB0

E R/W

RS

D0

FR

VDD XSCL LP V5 V4 V3 V2 V1 OSC2

Unit: mm

PIN DESCRIPTION

Symbol	No. of signals	Function
RS	1	Register select signal
	1	Read/write select signal
R/W
E	1	Read/write execute signal
DB0 to DB7	8	Data bus
LP	1	Data latching pulse
XSCL	1	Data transfer clock
FR	1	LCD AC driving signal
DO	1	Serial data
	16	Common outputs
COM 1 to COM16		COM9 to COM16: non-select for 1/8 duty
		COM12 to COM16: non-select for 1/11 duty
SEG1 to SEG40	40	Segment outputs
V1 to V5	5	>
		LCD driving power (V5 = VSS)
VDD	1	+5V
VSS	1	0V (GND)
OSC1		Used to connect resistor (typ. 91K-ohms) for oscillation;
OSC2	2	OSC1 is for external clock input.

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RS	R/W		E	Operation
0	0			Instruction write cycle
0	1	1		Busy flag read cycle
				Address counter read cycle
1	0			DD RAM or CG RAM data write cycle
1	1	1		DD RAM or CG RAM data read cycle

ABSOLUTE MAXIMUM RATINGS				(VSS=0V, Ta=25˚C)
	Rating	Symbol	Value		Unit
	Supply voltage (1)	VDD	-0.3 to 7.0		V
	Supply voltage (2)	V1 to V5	-0.3 to VDD+0.3		V
	Input voltage	VI	-0.3 to VDD+0.3		V
	Output voltage	VO	-0.3 to VDD+0.3		V
	Power dissipation	PD	300		mW
	Operating temperature	Topr	-20 to 75		˚C
	Storage temperature	Tstg	-65 to 150		˚C
	Soldering temperature and time	Tsol	260˚C 10s (at lead)		—
			> > > > >
	Note: The following condition must always hold true: VDD=V1=V2=V3=V4=V5

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