SIC63616-(Rev. 1.0) NO. P76
3240-0412
VCCKS0, VCCKS1: VC boost frequency select register (FF12H•D0, D1)
Controls the boost clock supply to the LCD system voltage regulator.
Table 4.6.6.2 Controlling boost clock
VCCKS1
1
0
0
Boost clock control
Prohibited
On (2 kHz)
Off
VCCKS0
*
1
0
The LCD system voltage regulator uses the boost clock supplied from the clock manager for boosting/
reducing the voltage. Use this register to control the clock supply. Set VCCKS to "01B" before writing "1"
to LPWR. When LCD display is not necessary, stop the clock supply by setting VCCKS to "00B" to reduce
power consumption.
At initial reset, this register is set to "00B".
FLCKS0, FLCKS1: Frame frequency select register (FF12H•D2, D3)
Selects the frequency of the frame clock supplied from the clock manager.
Table 4.6.6.3 Selecting frame frequency
FLCKS1
1
1
0
0
Frame frequency
8 Hz
16 Hz
24 Hz
32 Hz
FLCKS0
1
0
1
0
(When f
OSC1
= 32.768 Hz)
See Table 4.6.6.5 for the frame frequency when 1/24 duty is selected by the LDUTY0–LDUTY2 register.
At initial reset, this register is set to "00B".
DSPC0, DSPC1: Display mode select register (FF50H•D0, D1)
Sets the display mode.
Table 4.6.6.4 Display mode
DSPC1
1
1
0
0
Display mode
All white mode
All black mode
Reverse mode
Normal mode
DSPC0
1
0
1
0
In normal mode, the screen image written in the display RAM is output without being processed.
In reverse mode, the screen image written in the display RAM is output in reverse video.
All black mode turns all the LCD pixels on (black when normal white LCD is used) in static drive.
All white mode turns all the LCD pixels off (white when normal white LCD is used) in dynamic drive.
The contents in the display RAM are not modified by setting this register.
At initial reset, this register is set to "00B".
LPAGE: LCD display memory area select register (FF50H•D2)
Selects the display memory area at 1/16 duty drive.
When "1" is written: F200H–F36FH
When "0" is written: F000H–F16FH
Reading: Valid
By writing "1" to the LPAGE register, the data set in F200H–F36FH (the second half of the display memory)
is displayed, and when "0" is written, the data set in F000H–F16FH (the first half of the display memory) is
displayed.
This function is valid only when 1/16 duty is selected, and when 1/24 or 1/32 duty is selected, this register
can be used as a general purpose register.
At initial reset, this register is set to "0".