S6A0074 Datasheet, PDF (29/68 Pages) Samsung semiconductor – 34COM/80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD

34COM/80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD
S6A0074
Function Set
(RE = 0)
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0
0
0
0
1
DL
N
RE(0)
-
-
DL: Interface data length control bit
When DL = "High", it means 8-bit bus mode with MPU.
When DL = "Low", it means 4-bit bus mode with MPU. So to speak, DL is a signal to select 8-bit or 4-bit
bus mode.
When 4-bit bus mode, it needs to transfer 4-bit data by two times.
N: Display line number control bit
It is variable only when NW bit of extended function set instruction is Low.
When N = "Low", it means 1-line display mode.
When N = "High", 2-line display mode is set.
When NW = "High", N bit is invalid, it means 4-line mode independent of N bit.
RE: Extended function registers enable bit
At this instruction, RE must be "Low".
DH: Display shift enable selection bit
When DH = ”High”, enable display shift per line.
When DH =”Low”, enable smooth dot scroll.
This bit can be accessed only when IE pin input is “High”.
REV:
dots
Reverse enable bit
When REV = “High”, all the display data are reversed. i.e., all the white dots become black and black
become white.
When REV =”Low”, the display mode set normal display.
(RE = 1)
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0
0
0
0
1
DL
N
RE(1)
BE
0
DL: Interface data length control bit
When DL = "High", it means 8-bit bus mode with MPU.
When DL = "Low", it means 4-bit bus mode with MPU. So to speak, DL is a signal to select 8-bit or 4-bit
bus mode.
When 4-bit bus mode, it needs to transfer 4-bit data by two times.
N: Display line number control bit
It is variable only when NW bit of extended function set instruction is low.
When N = "Low", it means 1-line display mode.
When N = "High", 2-line display mode is set.
When NW = "High", N bit is invalid, it means 4-line mode independent of N bit.
RE: Extended function registers enable bit
When RE = "High", extended function set registers, SEGRAM address set registers, BID bit, HS/DS bits
of shift/scroll enable instruction and BE bits of function set register can be accessed.
BE: CGRAM/SEGRAM data blink enable bit If BE is "High", It makes user font of CGRAM and segment of
SEGRAM blink. The quantity of blink is assigned the highest 2 bit of CGRAM/SEGRAM.
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