LCD CONTROLLER/DRIVER
KS57C2308/P2308/C2316/P2316
12-4
LCD CONTROL REGISTER (LCON)
The LCD control register (LCON) is used to turn the LCD display on and off, to output LCD clock (LCDCK) and
synchronizing signal (LCDSY) for LCD display expansion, and to control the flow of current to dividing resistors in
the LCD circuit. Following a
RESET
, all LCON values are cleared to "0". This turns the LCD display off and stops
the flow of current to the dividing resistors.
The effect of the LCON.0 setting is dependent upon the current setting of LMOD.3.
Table 12-2. LCD Control Register (LCON) Organization
LCON Bit
Setting
Description
LCON.3
0
This bit is used for internal testing only; always logic zero.
LCON.2
0
Disable LCDCK and LCDSY signal outputs.
1
Enable LCDCK and LCDSY signal outputs.
LCON.1
0
Always logic zero.
LCON.0
0
LCD output low, display off; cut off current to dividing resistor, and output port
8 latch contents.
1
If LMOD.3 = “0”:; LCD display off; output port 8 latch contents.
If LMOD.3 = “1”: COM and SEG output in display mode; LCD display on.
Table 12-3. LCON.0 and LMOD.3 Bit Settings
LCON.0
LMOD.3
COM0–COM3
SEG0–SEG31
P8.0–P8.7
0
–
Output low; LCD display off
Output low;
LCD display off
Output latch
contents
Cut off current to
dividing resistors
1
0
LCD display off
LCD display off Output latch
contents
LCD display off
1
COM output corresponds to display
mode
SEG output
corresponds to
display mode
Output latch
contents
LCD display on
LCON
“0”
LCON.2
"0"
LCON.0
F8EH
Summary of Contents for KS57C2308
Page 30: ...ADDRESS SPACES KS57C2308 P2308 C2316 P2316 2 22 NOTES ...
Page 168: ...SAM47 INSTRUCTION SET KS57C2308 P2308 C2316 P2316 5 94 NOTES ...
Page 170: ......
Page 206: ...POWER DOWN KS57C2308 P2308 C2316 P2316 8 8 NOTES ...
Page 210: ...RESET KS57C2308 P2308 C2316 P2316 9 4 NOTES ...
Page 222: ...I O PORTS KS57C2308 P2308 C2316 P2316 10 12 NOTES ...
Page 272: ...LCD CONTROLLER DRIVER KS57C2308 P2308 C2316 P2316 12 24 NOTES ...
Page 280: ...SERIAL I O INTERFACE KS57C2308 P2308 C2316 P2316 13 8 NOTES ...
Page 294: ...MECHANICAL DATA KS57C2308 P2308 C2316 P2316 15 2 NOTES ...
Page 310: ...KS57P2308 P2316 OTP KS57C2308 P2308 C2316 P2316 16 16 NOTES ...
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