參數(shù)資料
型號(hào)： LC74723
元件分類(lèi)： 畫(huà)面疊加
英文描述： ON-SCREEN DISPLAY IC, PDIP24
封裝： 0.300 INCH, PLASTIC, SDIP-24
文件頁(yè)數(shù)： 9/12頁(yè)
文件大?。?/td> 245K
代理商： LC74723
Display Control Commands
Display control commands are input as serial data in 8-bit units. Commands consist of a first byte that includes the
command identifier code and data in the following second byte. The LC74723 supports the following six commands.
1. COMMAND0: Set display memory (VRAM) write address
2. COMMAND1: Set up display character data write
3. COMMAND2: Set vertical display start position and vertical character size
4. COMMAND3: Set horizontal display start position and horizontal character size
5. COMMAND4: Display control
6. COMMAND5: Display control
Display Control Command Table
Once written, the command identifier code in the first byte is stored until the next first byte is written. However, when
the display character data write command (COMMAND1) is written, the LC74723 locks into the display character data
write mode, and another first byte cannot be written.
When a high level is input to the CS pin, the LC74723 is set to COMMAND0 (display memory write address setting
mode).
1. COMMAND0 (Display memory write address setting command)
First byte
No. 4841-6/12
LC74723, 74723M
First byte
Second byte
Command
Command identifier code
Data
76
5
4
3
2107
6543
2
1
0
COMMAND0
10
0
V3
V2
V1
V0
0
H4
H3
H2
H1
H0
(Set write address)
COMMAND1
10
0
1
0
000
at
0
c5c4c3
c2
c1c0
(Write character)
COMMAND 2 (Vertical display start
10
1
0
VS
0
VS
0FS
VP
position and vertical character size)
20
10
5
4
3
2
1
0
COMMAND3 (Horizontal display start
10
1
EGP
HS
0
HS
0LC
HP
position and horizontal character size)
20
10
5
4
3
2
1
0
COMMAND4
11
0
TST
RAM
OSC
SYS
0
EGL
NON
EG
BK
RV
DSP
(Display control)
MOD ERS
STP
RST
1
0
ON
COMMAND5
11
0
1
0
PH
RSN
INT
—
(Synchronization signal control)
DA
Register
Contents
Remarks
0 to 7
name
State
Function
7—
1
6—
0
Command 0 identification code
5—
0
Set display memory write address.
4—
0
3V3
0
1
2V2
0
1
Display memory address (0 to 9 hexadecimal)
1V1
0
1
0V0
0
1
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