參數(shù)資料
型號(hào): LC74730M
元件分類: 畫面疊加
英文描述: ON-SCREEN DISPLAY IC, PDSO30
封裝: MFP30S
文件頁(yè)數(shù): 10/14頁(yè)
文件大?。?/td> 250K
代理商: LC74730M
Serial Data Input Timing
Display Control Commands
The display control commands have an 8-bit serial input format. Commands consist of a first byte, which includes the
command identification code, and data in the second and following bytes. The LC74730M supports the following
commands:
① COMMAND 0: Display memory (VRAM) write address setup command
② COMMAND 1: Display character data write command
③ COMMAND 2: Vertical display start position and vertical size setup command
④ COMMAND 3: Horizontal display start position and horizontal size setup command
⑤ COMMAND 4: Display control setup command
⑥ COMMAND 5: Synchronizing signal control setup command
Display Control Command Table
The command identification code in a first byte is retained until the next first byte is written. However, if a display
character data write command (COMMAND 1) is written, the LC74730M locks in display character data write mode,
and the first byte cannot be overwritten.
The command state is reset to the COMMAND 0 state (display memory address setup mode) when the CS pin is set high.
No. 4247-5/14
LC74730M
First byte
Second byte
Command
Command identification code
Data
7654321076543210
COMMAND 0
1000
V3
V2
V1
V0
000
H4
H3
H2
H1
H0
Set write address
COMMAND 1
10010000
at
0
c5
c4
c3
c2
c1
c0
Write character
COMMAND 2
1010
VS
00
VP
Set vertical display start position and
21
20
11
10
543210
vertical character size
COMMAND 3
1011
HS
00
HP
Set horizontal display start position
21
20
11
10
543210
and horizontal character size
COMMAND 4
1100
TST
CB
OSC
SYS
00
NON
EG
BK
RV
DSP
Display control
MOD
STP
RST
1
0
ON
COMMAND 5
1101
PH
BCL
INT
0000
SN
Synchronizing signal control
1
0
3210
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