SBN0064G Datasheet, PDF (15/37 Pages) List of Unclassifed Manufacturers – Dot-matrix STN LCD 64-SEGMENT Driver with 64-row x 64-column Display Data Memory

Avant Electronics
SBN0064G
Dot-matrix STN LCD 64-SEGMENT Driver with 64-row x 64-column Display Data Memory
7.3 Display Start Line and the Display Start Line Register
The Display Start Line Register is a 6-bit register. It points at the first row of a block of the Display Data Memory, which
will be mapped to COM0. The length of the block of the memory is decided by the display duty, which is decided by the
SBN6400G. For example, if the Display Start Line Register is programmed with 00010 (decimal 2) and display duty is
1/64, then Row2 of the Display Data Memory will be mapped to COM0 of LCD panel, Row3 to COM1, Row4 to COM2,
.....Row62 to COM60, Row63 to COM61, ....Row0 to COM62, and finally Row1 to COM63, as illustrated in Fig. 9.
Row 0
Row 1
Row 2
Row 3
0 0 001 0
A5 A4 A3 A2 A1 A0
Display Start Line Register
Row 60
Row 61
Row 62
Row 63
Display Data Memory
COM 0
COM 1
COM 2
COM 3
COM 60
COM 61
COM 62
COM 63
LCD panel
Fig.9 Display Start Line Register
To program this register, the setting of the control bus is given in Table 8 and the setting of the data bus is given in
Table 9.
Table 8 The setting of the control bus for programming the Display Start Line Register
C/D
R/W
0
0
Table 9 The setting of the data bus for programming the Display Start Line Register
D7(MSB)
D6
D5
D4
D3
D2
D1
D0(LSB)
1
1
A5
A4
A3
A2
A1
A0
A5 ~ A0 are Display Start Line address bits and can be programmed with a value in the range from 0 to 63. Therefore,
the code can be from 1100 0000 (C0 Hex) to 1111 1111 (FF Hex).
2005 May 20
15 of 37
data sheet (v3)