HD66766R Datasheet, PDF (71/97 Pages) Hitachi Semiconductor – 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors

HD66766R
Rev. 1.0-1 / September 2002
Restrictions on the 1st/2nd Screen Driving Position Register Settings
The following restrictions must be satisfied when setting the start line (SS17-10) and end line (SE17-10)
of the 1st screen driving position register (R14h) and the start line (SS27-20) and end line (SE27-20) of
the 2nd screen driving position register (R15h) for the HD66766R. Note that incorrect display may
occur if the restrictions are not satisfied.
Table 39 Restrictions on the 1st/2nd Screen Driving Position Register Settings
1st Screen Driving (SPT = 0)
2nd Screen Driving (SPT = 1)
Register setting
Display operation
SS17-10 ≤SE17-0 ≤ “AF”H
• Time-sharing driving for COM pins
(SS1+1) to (SE1+1)
• Non-selection level driving for others
SS17-10 ≤ SE17-10 < SS27-20
≤SE27-20 ≤ “AF”H
• 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 SS27-20 and SE27-20 settings are ignored.
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