Contents
7.6
Display Timing Circuit....................................................................................... 21
7.6.1
7.6.2
7.6.3
Signal Generation for the Display Line Counter and
the Display Data Latching Circuit ......................................................................21
Generation of the Alternate Signal M (Internal) and
the Synchronous Signal FLM (Internal).............................................................21
Display Data Latching Circuit ............................................................................21
LCD Drive Circuit...............................................................................................22
Oscillator Circuit ................................................................................................22
7.7
LCD Driver Output Timing ................................................................................ 22
7.7.1
7.7.2
7.8
7.9
Power Supply Circuit ........................................................................................ 23
Booster Circuit.................................................................................................. 23
7.10 Electronic Volume............................................................................................. 24
7.11 Voltage Regulator............................................................................................. 25
7.12 Voltage Generation Circuit ............................................................................... 25
7.13 EEPROM Function ........................................................................................... 27
7.13.1 EEPROM Program, Read, and Erase Flow Charts ..........................................28
7.13.2 Vop Calibration Offset Examples ......................................................................30
7.14 Partial Display Function.................................................................................... 33
7.15 Discharge Circuit .............................................................................................. 34
7.16 Scroll Function.................................................................................................. 34
7.17 Initial Values ..................................................................................................... 37
7.18 Safety Measures when Switching Power ON and OFF.................................... 37
7.18.1 When Using the External Power Supply ............................................................37
7.18.2 When Using the Built-in Power Supply ..............................................................38
7.18.3 Power Supply Rising Time .................................................................................38
7.19 Register Setting Examples ............................................................................... 39
7.19.1 Initialization ........................................................................................................39
7.19.2 Display Data .......................................................................................................40
7.19.3 Power OFF.........................................................................................................40
8
Control Register .......................................................................................... 41
8.1
Control Registers.............................................................................................. 41
8.1.1
8.1.2
8.1.3
Control Register (Bank 0)..................................................................................41
Control Register (Bank 1)..................................................................................42
Control Register (Bank 2)..................................................................................43
X Address Register (AX) ...................................................................................44
Y Address Register (AY)....................................................................................44
n Line Alternated Register (N)...........................................................................45
Display Control Display (1) Register .................................................................46
Display Control (2) Register ..............................................................................46
Increment Control Register Set.........................................................................47
Power Control Register .....................................................................................50
LCD Duty (DS) ..................................................................................................51
Booster Setup (VU) ...........................................................................................52
Product Specification (V0.4) 08.15.2005
8.2
Functions of the Control Registers ................................................................... 44
8.2.1
8.2.2
8.2.3
8.2.4
8.2.5
8.2.6
8.2.7
8.2.8
8.2.9
iv
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EMC [ ELAN MICROELECTRONICS CORP ]
