HD66760 Datasheet, PDF (80/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

HD66760
Restrictions on the 1st/2nd Screen Driving Position Register Settings
The following restrictions must be satisfied when setting the start line (SS16–10) and end line (SE16–10) of
the 1st screen driving position register (R14h) and the start line (SS26–20) and end line (SE26–20) of the 2nd
screen driving position register (R15h) for the HD66760. Note that incorrect display may occur if the
restrictions are not satisfied.
Table 38 Restrictions on the 1st/2nd Screen Driving Position Register Settings
1st Screen Driving (STP = 0)
2nd Screen Driving (STP = 1)
Register setting SS16-10 ≤ SE16-0 ≤ 4FH
SS16-10 ≤ SE16-10 < SS26-20
≤ SE26-20 ≤ 4FH
Display operation
• Time-sharing driving for COM pins
(SS1+1) to (SE1+1)
• Non-selection level driving for others
• Time-sharing driving for COM pins
(SS1+1) to (SE1+1) and (SS2+1) to
(SE2+1)
• Non-selection level driving for others
Notes: 1. When the total line count in screen division driving settings is less than the duty setting, non-
selection level driving is performed without the screen division driving setting range.
2. When the total line count in screen division driving settings is larger than the duty setting, the start
line, the duty-setting line, and the lines between them are displayed and non-selection level driving
is performed for other lines.
3. For the 1st screen driving, the SS26-20 and SE26-20 settings are ignored.