ks0074 Samsung Semiconductor, Inc., ks0074 Datasheet - Page 35

• Manufacturer Part Number: ks0074
• Description: 34com/80seg Driver & Controller For Dot Matrix Lcd
• Manufacturer: Samsung Semiconductor, Inc.

KS0074
* Note : 1. When an MPU program with Busy Flag (DB7) checking is made, 1/2 Fosc (is necessary) for executing the next
Instruction RE
SEGRAM
Function
CGRAM
Quantity
Address
Address
DDRAM
Address
flag and
Address
Enable
Scroll
Scroll
Read
Read
Busy
Write
Data
Data
Set
Set
Set
Set
Set
2. “X” don’t care
instruction by the falling edge of the “E” signal after the Busy Flag (DB7) goes to “Low”.
1
0
1
0
1
0
1
X
X
X
R
S
0
0
0
0
0
0
0
0
1
1
R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0
0
0
0
0
0
0
1
0
1
BF AC6 AC5 AC4 AC3 AC2 AC1 AC0
D7 D6 D5
D7 D6 D5
0
0
0
0
0
1
1
AC6 AC5 AC4 AC3 AC2 AC1 AC0
X QC5 QC4 QC3 QC2 QC1 QC0
0
0
0
1 AC5 AC4 AC3 AC2 AC1 AC0
1
Instruction Code
34COM/80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD
0
1 DL
1
X
1 HS4 HS3 HS2 HS1
DL N RE(1) BE 0
D4 D3 D2 D1
D4 D3 D2 D1
X AC3 AC2 AC1 AC0 Set SEGRAM address in address
N RE(0) X X
D0
D0
Determine the line for horizontal smooth
scroll.
Set interface data length
numbers of display line when NW = "0",
extension register, RE("0"),
Set DL, N, RE("1") and
CGRAM/SEGRAM blink enable (BE)
Set CGRAM address in address counter.
counter.
Set DDRAM address in address counter.
Can be known whether during internal
operation or not by reading BF. The
contents of address counter can also be
read. BF = “1” : busy state,
Write data into internal RAM
(DDRAM / CGRAM / SEGRAM).
Read data from internal RAM
(DDRAM / CGRAM / SEGRAM).
Set the quantity of horizontal dot scroll.
HS1 = "1/0" : 1st line dot scroll
HS2 = "1/0" : 2nd line dot scroll
HS3 = "1/0" : 3rd line dot scroll
HS4 = "1/0" : 4th line dot scroll
BE = " 1/0" : CGRAM/SEGRAM
DL = "1" : 8-bit,
DL = "0" : 4-bit
N = "1" : 2-line,
N = "0" : 1-line
BF = “0” : ready state.
blink enable/disable
enable/disable
enable/disable
enable/disable
enable/disable
Description
(Table 10. continued)
Execution
270 kHz)
(fosc =
Time
39 s
39 s
39 s
39 s
39 s
39 s
39 s
s
s
s