Samsung KS57C2308 Manual page 251

KS57C2308/P2308/C2316/P2316
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 f
display can be allocated to general-purpose use.
Display Mode
Static
1/2
1/3
1/4
NOTE: N/C = no connection is required.
signal. RAM addresses in this location that are not used for LCD
LCD
1E0H BIT3 BIT2
1E1H
. . . .
. . . .
. . . .
1F8H
1F9H
1FAH
1FBH
1FCH
1FDH
1FEH
1FFH
COM3 COM2
Figure 12-3. LCD Display Data RAM Organization
Table 12-1. Common Signal Pins Used per Duty Cycle
COM0 Pin
Selected
Selected
Selected
Selected
BIT1 BIT0
. . . .
. . . .
. . . .
P8.0
P8.1
P8.2
P8.3
P8.4
P8.5
P8.6
P8.7
COM1 COM0
COM1 Pin
N/C
Selected
Selected
Selected
LCD CONTROLLER/DRIVER
SEG0
SEG1
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
COM2 Pin COM3 Pin
N/C
N/C
Selected
Selected Selected
N/C
N/C
N/C
12-3