SBN1661G_M18 Datasheet, PDF (25/52 Pages) List of Unclassifed Manufacturers – Dot-matrix STN LCD Driver with 32-row x 80-column Display Data Memory

Avant Electronics SBN1661G_M18, SBN1661G_M02, SBN0080G_S18, SBN0080G_S02
Dot-matrix STN LCD Driver with 32-row x 80-column
7.8 Select Duty and the Select Duty Register
The Select Duty Register is a 1-bit register. If it is programmed with HIGH, 1/32 display duty is selected. If it is
programmed with LOW, 1/16 display duty is selected.
To program this register, the setting of the control bus is given in Table 22 and the setting of the data bus is given in
Table 23.
Table 22 The setting of the control bus for programming the Select Duty Register
C/D
E/(RD)
R/W(WR)
0
1
0
Table 23 The setting of the data bus for programming the Select Duty Register
D7(MSB)
D6
D5
D4
D3
D2
D1
D0(LSB)
1
0
1
0
1
0
0
D
The least significant bit D can be programmed with either 0 or 1. Therefore, the code is A8 Hex or A9 Hex.
In a Master-Slave connection using the SBN1661G_M18 or the SBN1661G_M02 as the master, COM0~COM15 will be
from the master and COM16~COM31 will be from the slave. The Select Duty Register of both the Master and the Slave
should be programmed with HIGH to select 1/32 duty. Fig.15 shows the COMMON sequence of this connection.
Frame Signal
(From Master)
COM0~COM15
(From Master)
01 2
COM16~COM31
(From Slave)
13 14 15
16 17 18
012
29 30 31
13 14 15
16 17 18
29 30 31
Fig.15 COMMON sequence of Master-Slave connection
This register is not available in the SBN0080G_S18 and the SBN0080G_S02, because both the devices are purely
Segment Drivers and their duty cycle is decided by the FR and the CL from the master.
2006 Aug 16
25 of 52
data sheet (v6.3)