SBN0064G Datasheet, PDF (17/37 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
7.5 Display Data Memory Page and the Page Address Register
The Display Data Memory is divided into 8 pages: Page 0 ~ Page 7, with each page having 64 bytes in horizontal
direction. Page 0 is from Row 0 to Row 7, Page 1 from Row 8 to Row 15, Page 2 from Row 16 to Row 23, and Page 3
from Row 24 to Row 31,...etc, as shown in Fig 11. When the host microcontroller intends to perform a READ/WRITE
operation to the Display Data Memory, it has to program the Page Address Register to indicate which page it intends to
access.
Bit0
Bit1
Bit2
Page 0 ^Bit3
Bit4
Bit5
Bit6
Bit7
Bit0
Bit1
Bit2
Page 1 ^Bit3
Bit4
Bit5
Bit6
Bit7
Bit0
Bit1
Bit2
Page 7
Bit3
Bit4
Bit5
Bit6
Bit7
Row 0
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
Row 7
Row 8
Row 9
Row 10
Row 11
Row 12
Row 13
Row 14
Row 15
Row 16
Row 17
Row 18
Row19
Row52
Row 53
Row 54
Row 55
Row 56
Row 57
Row 58
Row 59
Row 60
Row 61
Row 62
Row 63
Fig.11 Page/Column address of the Display Data Memory
To program this register, the setting of the control bus is given in Table 10 and the setting of the data bus is given in Table
11.
Table 10 The setting of the control bus for programming the Page Address Register
C/D
R/W
0
0
Table 11 The setting of the data bus for programming the Page Address Register
D7(MSB)
D6
D5
D4
D3
D2
D1
D0(LSB)
1
0
1
1
1
A2
A1
A0
A2, A1and A0 are page address bits and can be programmed with a value in the range from 0 to 7. A2 A1 A0=000 selects
Page 0; A2 A1 A0=001 selects Page 1; A2 A1 A0=010 selects Page 2, and A2 A1 A0=011 selects Page 3...etc.
Therefore, the code can be from 1011 1000 (B8 Hex) to 1011 1111 (BF Hex).
2005 May 20
17 of 37
data sheet (v3)