Seiko Instruments G1216B1N000 user manual Circuit Configuration, Block Diagram

AN.No.G1216B1N000-3D0E

2.CIRCUIT CONFIGURATION

2.1Block Diagram

This product consists of two HD61202 segment drivers, an HD61203 common driver and a bias voltage generator. Figure 2 shows the block diagram.

DB0 to DB7
RST, R/W, D / I, E
CS2
CS1
VLC	Bias Voltage		Va, Vc, Vd, Vf
		Generator
		Va
VDD		Vb
		Ve
VSS		Vf		FRM	Segment Driver 1	Segment Driver 2
				M
				CL2

￿1		64	64
2
Common Driver
	64	128￿64 full dot matrix LCD

LEDA

LED Backlight

LEDC

Figure 2 Block Diagram

2.2Segment Drivers (HD61202)

The segment driver is a 64 drive output CMOS IC. The G1216 is driven with the panel divided into two right and left displays. A segment driver controls the divided screen. 8 bits of data transmitted from the MPU are saved in the internal display RAM, and the segment signal is generated to drive the LC. 1 bit of display RAM data corresponds to 1 dot lighting or non-lighting on the LC panel.

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