KS57C2308/P2308/C2316/P2316
LCD CONTROLLER/DRIVER
12-5
LCD MODE REGISTER (LMOD)
The LCD mode control register LMOD is used to control display mode; LCD clock, segment or port output, and
display on/off. LMOD can be manipulated using 8-bit write instructions, bit 3 (LMOD.3) can be also written by
1-bit instructions.
F8CH
LMOD.3
LMOD.2
LMOD.1
LMOD.0
F8DH
LMOD.7
LMOD.6
LMOD.5
LMOD.4
The LCD clock signal, LCDCK, determines the frequency of COM signal scanning of each segment output which
is also referred to as the frame frequency. Since LCDCK is generated by dividing the watch timer clock (fw), the
watch timer must have been enabled when the LCD display is turned on.
RESET
clears the LMOD register values
to logic zero.
The LCD display can continue to operate during idle and stop modes if a subsystem clock is used as the watch
timer source and running. The LCD mode register LMOD controls the output mode of the 8 pins used for normal
outputs
(P8.0–P8.7). Bits LMOD.7–6 define the segment output and normal bit output configuration.
Table 12-4. LCD Mode Register (LMOD) Organization
LMOD.7
LMOD.6
LCD Output Segments and 1-Bit Output Pins
0
0
Segments 24–27, and 28–31
0
1
Segments 24–27; 1-bit output at P8.4–P8.7
1
0
Segments 28–31; 1-bit output at P8.0–P8.3
1
1
1-bit output only at P8.0–P8.3 and P8.4–P8.7
LMOD.5
LMOD.4
LCD Clock (LCDCK) Frequency
0
0
32.768 kHz watch timer clock (fw)/2
9
= 64 Hz
0
1
fw/2
8
= 128 Hz
1
0
fw/2
7
= 256 Hz
1
1
fw/2
6
= 512 Hz
LMOD.3
LMOD.2
LMOD.1
LMOD.0
Duty and Bias Selection for LCD Display
0
–
–
–
LCD Display off
1
0
0
0
1/4 duty, 1/3 bias
1
0
0
1
1/3 duty, 1/3 bias
1
0
1
0
1/2 duty, 1/2 bias
1
0
1
1
1/3 duty, 1/2 bias
1
1
0
0
Static
Summary of Contents for C2316
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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