Seiko Instruments G1216B1N000-3D0E user manual

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AN.No.G1216B1N000-3D0E

(4)Display start line register

The display start line register is a register which determines the line address (see Figure 6) for which data is displayed on the top line of the LCD screen when displaying the contents of the display data RAM on the LCD screen. It is also used to scroll the display. The 6 bit (0 to 63) display start line information is written in this register by the Display Start Line Set Instruction.

The contents of this register are transmitted to address counter Z at “H” level of the FRM signal (common driver output) which indicates the display start on the screen.

(5)Z-address counter

The Z-address counter generates the address to output the display data synchronized with the common signal. This is a 6-bit counter which counts at the fall of the CL signal (common driver output). The contents of the display start line register are preset to the Z-address counter at “H” level of the FRM signal (common driver output).

(6)Display data RAM

The display data RAM is a RAM that stores the display dot data. 1 bit of RAM data corresponds to lighting (data=1) or non-lighting (data = 0) of 1 dot of the display on the LCD screen. Figure 6 shows the relationship between the address and data inside the RAM on either the right or left screen (64￿64 dots). In this case, the display start line is 0.

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Contents USER’S Manual AN.No.G1216B1N000-3D0ECopyright 1993 by Seiko Instruments Inc Contents General Power supply voltage +80 Temperature StorageSymbol Conditions Min Typ Max Unit Input High Voltage∅ = 25 C Vopr=13.0 Contrast Min Typ Max Unit Remark25 C Vopr=13.0 Viewing angle 25 C Vopr=13.0AN.No.G1216B1N000-3D0E Definition of response time −20 To +70 Storage temp. rangeChips=20 LedaNumber of LED LedcDB2 DB0DB1 DB3V c, V d, V f Circuit ConfigurationCS2 CS1 CS R/W FRMMSB LSBBusy Page COM3 COM1COM2 COM4Operational Amplifier Bias R2= 9 4 R1= 5 R1 CS1 CS2 Operating InstructionsMPU To DB7 450140 Test point RL = 2.4 k = 11 kReset time Rise time 200D/I FunctionDetailed explanation Display ON/OFF Code Display start line=0 Display start line=1 AN.No.G1216B1N000-3D0E Display start line CodeDB7 DB0 Display start line =2 Display start line=3Display Data RAM Address Configuration AN.No.G1216B1N000-3D0E Address page set CodeReset =1.2 k Ω Voltage V opr 13.5 13.0 12.5 11.5 10.5=10 k Ω Variable resistor=Allowable LED forward current a =Input voltage power voltageV=LED forward voltage Leda LedcD0 to D7 A0 to A7 DB0 to DB7 A0 to A15 Decoder MPU Connection DiagramZ80 PIO Iorq RST CS1Precautions 9, 11, 12, 17, 18, 19 11, 12, 1710, 16, 17 LC drive voltageSeiko Instruments Inc
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