LC7441N, 7441NE
No.3941–17/20
Operating Information
The LC7441 operates under input pin control when SER/
PIN is LOW, and under serial control, when SER/PIN is
HIGH. It can display one sub-screen when under input
pin control, and either one or two sub-screens, when
under serial control.
Single- or Dual-screen Operation Under Serial
Control
Writing register data to address 0 selects single-screen
mode, and writing data to address 1, dual-screen mode.
The registers selecting single-screen parameters are
VWIPE, HWIPE and the address 0 registers. The register
selecting dual-screen parameters are WKVAR1,
WKVAR2 and the address 1 registers.
Sub-screen ON/OFF
Pin control
The sub-screen is ON when the KDIS input is HIGH, and
OFF, when LOW.
Serial control, single screen
The sub-screen is ON when KOUT is HIGH, and OFF,
when LOW.
Serial control, dual screen
Sub-screen 1 is ON when KOUT1 is HIGH, and OFF,
when LOW. Sub-screen 2 is ON when KOUT2 is HIGH,
and OFF, when LOW.
Sub-screen Position
The sub-screen position can be fixed or variable. The
four fixed positions are shown in figure 8, and the
variable position , which is determined by the VP0 to
VP5 and HP0 to HP5 registers as follows, in figure 9.
VP = ((VP0 to VP5) + 1)
× 5H + 3H
HP= ((HP0 to HP5) + 6)
×
Note that variable positions outside the main-screen area
are ignored.
Figure 8. Sub-screen positions
Note
Figures in brackets apply to PAL displays.
Figure 9. Variable screen positions
Note
Normal write-VCO frequency is 1280fH.
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