KS57C2308/P2308/C2316/P2316 LCD CONTROLLER/DRIVER
12-3
LCD RAM ADDRESS AREA
RAM addresses of bank 1 are used as LCD data memory. These locations can be addressed by 1-bit, 4-bit
instructions. When the bit value of a display segment is "1", the LCD display is turned on; when the bit value is
"0", the display is turned off.
Display RAM data are sent out through segment pins SEG0–SEG31 using a direct memory access (DMA)
method that is synchronized with the fLCD signal. RAM addresses in this location that are not used for LCD
display can be allocated to general-purpose use.
SEG01E0H
1E1H
1FAH
1FBH
1FCH
1FDH
1FEH
1FFH
1F9H
1F8H
COM3 COM2 COM1 COM0
BIT0
.
.
.
.
.
.
P8.0
P8.1
P8.2
P8.3
P8.4
P8.5
P8.6
P8.7
BIT1
.
.
.
.
.
.
BIT2
.
.
.
.
.
.
BIT3
.
.
.
.
.
.
SEG1
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
Figure 12-3. LCD Display Data RAM Organization
Table 12-1. Common Signal Pins Used per Duty Cycle
Display Mode COM0 Pin COM1 Pin COM2 Pin COM3 Pin
Static Selected N/C N/C N/C
1/2 Selected Selected N/C N/C
1/3 Selected Selected Selected N/C
1/4 Selected Selected Selected Selected
NOTE:N/C = no connection is required.