HD66765 Datasheet, PDF (69/71 Pages) Hitachi Semiconductor – 396-channel Segment Driver with Internal RAM for 4096-color Displays

HD66765
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 (R14) and the start line (SS27-20) and end line (SE27-20) of the
2nd screen driving position register (R15) for the HD66765. Note that incorrect display may occur if the
restrictions are not satisfied.
Table 27 Restrictions on the 1st/2nd Screen Driving Position Register Settings
1st Screen Driving (SPT = 0)
2nd Screen Driving (SPT = 1)
Register setting SS17-10 ≤ SE17-0 ≤ AFH
SS17-10 ≤ SE17-10 < SS27-20
≤ SE27-20 ≤ AFH
ation ^{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
ific 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.
c ^{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
e _{level driving is performed for other lines.}
Preliminary ^{Sp 3. For the 1st screen driving, the SS27-20 and SE27-20 settings are ignored.}
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