CHAPTER 28:LCD Controller
S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G
1089
9.
Notes
This section shows notes.
−
Since resistance value of the external division resisters depends on the LCD to be used, connect
the resistors with a suitable value.
−
Non-selection level waveforms are output from the COM2 and COM3 pins in 1/2 duty display mode
and from the COM3 pin in 1/3 duty display mode.
−
If the settings of the LCD drive power control (VSEL), duty selection (MS [1:0]), frame cycle
selection (FP [1:0]), etc. are not proper, the LCD does not display correctly.
−
When neither the LCD nor general-purpose ports are used, connect a pull-up or pull-down resistor
to V3 to V0 pins.
−
The static drive is enabled when any setting other than LCS [3:0] = "0000" is set. The duty drive is
enabled when LCS [3:0] = "0000" is set.
−
Setting of display/non-display of the LCD with static drive (ST0 to ST8)
When the LCD with static drive (ST0 to ST8) is switched to non-display after reset, set LDR0:ST8
= "0" and LDR1:ST [7:0] = "00000000", and set the static drive selection port (LCS [3:0]). The
same potential pulses are output from the static drive pins (ST0 to ST8).
When the LCD with static drive (ST0 to ST8) is switched from non-display to display, set LDR0:ST8 and
LDR1:ST [7:0] without change of the static drive selection port (LCS [3:0]).
When the LCD with static drive (ST0 to ST8) is switched from display to non-display, set LDR0:ST8 = "0"
and LDR1:ST [7:0] = "00000000" without change of the static drive selection port (LCS [3:0]).
The same potential pulses are output from the static drive pins (ST0 to ST8).
−
When the LCD is used (static drive, duty drive), set the following.
LCR1 [7:0] = "11111111"
LCDCMR [3:0] = "1111"
In case of power shutdown, it works as following.
−
When port setting is LCD output, output the "Low".
−
LCD control is power shutdown, registers (LCR0, VRAMn (n=0 to 15), LCR1, LCDCMR, LCRS,
LDR) of LCD control is initialized when returning from power shutdown.
−
Registers (LCD_KEYCDR, SEGER, COMVER) of LCD port-related is not initialized.
Summary of Contents for S6J3200 Series
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