Z51F3220FNX Datasheet, PDF (263/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
11.15.2 LCD Display RAM Organization
Display data are stored to the display data area in the external data memory.
The display data which stored to the display external data area (address 0000H-001AH) are read automatically
and sent to the LCD driver by the hardware. The LCD driver generates the segment signals and common signals
in accordance with the display data and drive method. Therefore, display patterns can be changed by only
overwriting the contents of the display external data area with a program.
Figure 11-99 shows the correspondence between the display external data area and the COM/SEG pins. The
LCD is turned on when the display data is “1” and turned off when “0”.
SEG 26
SEG 25
SEG 24
SEG 23
SEG 22
001 AH
0019 H
0018 H
0017 H
0016 H
SEG 7
SEG 6
SEG 5
SEG 4
SEG 3
SEG 2
SEG 1
SEG 0
0007 H
0006 H
0005 H
0004 H
0003 H
0002 H
0001 H
0000 H
bit0 bit1 bit2 bit3 bit4 bit5 bit6 bit7
CC CC CCC C
O OO OO OO O
M MM MMM MM
0 12 34 56 7
Figure 11.99 LCD Circuit Block Diagram
PS029902-0212
PRELIMINARY
261