Epson S1C63558 manual 62

CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (LCD Driver)

		SEG0		SEG1		SEG2		SEG3		SEG47
	COM0	■ D0		■ D0		■ D0		■ D0		■ D0
	COM1	■ D1	F000H	■ D1	F002H	■ D1	F004H	■ D1	F006H . . . . .	■ D1	F05EH
	COM2	■ D2		■ D2		■ D2		■ D2		■ D2
LPAGE	COM3	■ D3		■ D3		■ D3		■ D3		■ D3
=0	COM4	■ D0		■ D0		■ D0		■ D0		■ D0
	COM5	■ D1	F001H	■ D1	F003H	■ D1	F005H	■ D1	F007H . . . . .	■ D1	F05FH
	COM6	■ D2		■ D2		■ D2		■ D2		■ D2
	COM7	■ D3		■ D3		■ D3		■ D3		■ D3
	COM0	■ D0		■ D0		■ D0		■ D0		■ D0
	COM1	■ D1	F100H	■ D1	F102H	■ D1	F104H	■ D1	F106H . . . . .	■ D1	F15EH
	COM2	■ D2		■ D2		■ D2		■ D2		■ D2
LPAGE	COM3	■ D3		■ D3		■ D3		■ D3		■ D3
=1	COM4	■ D0		■ D0		■ D0		■ D0		■ D0
	COM5	■ D1	F101H	■ D1	F103H	■ D1	F105H	■ D1	F107H . . . . .	■ D1	F15FH
	COM6	■ D2		■ D2		■ D2		■ D2		■ D2
	COM7	■ D3		■ D3		■ D3		■ D3		■ D3
	Unused	■ D0	F200H	■ D0	F202H	■ D0	F204H	■ D0	F206H . . . . .	■ D0	F25EH

(c) When 1/8 duty (48 ⋅ 8 mask option) is selected

Fig. 4.7.5.1 Correspondence between display memory and LCD dot matrix

When a bit in the display memory is set to "1", the corresponding LCD dot goes ON, and when it is set to "0", the dot goes OFF.

At 1/17 (1/16) duty drive, all data of COM0–COM16 (15) is output.

At 1/8 duty drive, data only corresponding to COM0–COM7 is output. However, since the display memory has capacity for two screens, it is designed so that the memory for COM8–COM15 shown in Figure 4.7.5.1 (a) can also be used as COM0–COM15. Select either F000H–F05FH or F100H–F15FH for the area to be displayed (to be output from COM0–COM7 terminals) using the LPAGE register. It can switch the screen in an instant.

At initial reset, the data memory content becomes undefined hence, there is need to initialize using the software.

The display memory has read/write capability, and the addresses that have not been used for LCD display can be used as general purpose registers. F050H–F05FH, F150H–F15FH, F250H, F252H, F254H,

· · ·, F25EH can be used as general purpose registers except when 48 ⋅ 8 is selected by mask option.

Note: When a program that access no memory mounted area (F060H–F0FFH, F160H–F1FFH, F201H, F203H, · · ·, F25FH) is made, the operation is not guaranteed.

52 EPSON S1C63558 TECHNICAL MANUAL