ks0070b Samsung Semiconductor, Inc., ks0070b Datasheet - Page 12

• Manufacturer Part Number: ks0070b
• Description: 16com / 80seg Driver & Controller For Dot Matrix Lcd
• Manufacturer: Samsung Semiconductor, Inc.

KS0070B
16COM / 80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD
Address Counter (AC)
The Address Counter (AC) stores DDRAM/CGRAM addresses, transferred from IR.
After writing into (reading from) DDRAM/CGRAM, AC is automatically increased
(decreased) by 1. When RS = "0" and R/W = "1", AC can be read through ports DB0~DB6.
Display Data RAM (DDRAM)
DDRAM stores display data of maximum 80 x 8 bits (80 characters).
DDRAM address is set in the address counter (AC) as a hexadecimal number. (Refer to Fig-1.)
LSB
MSB
AC6
AC5
AC4
AC3
AC2
AC1
AC0
Fig-1. DDRAM Address
1) 1-line display
In the case of a 1-line display, the address range of DDRAM is 00H ~ 4FH.
An Extension driver will be used. Fig-2 shows the example when a 40-segment
extension driver is added.
2) 2-line display
In the case of a 2-line display, the address range of DDRAM is 00H ~27H and 40H ~ 67H.
An Extension driver will be used. Fig-3 shows the example when a 40 segment
extension driver is added.