LC74794 View Datasheet(PDF) - SANYO -> Panasonic
Part Name
Description
Manufacturer
LC74794 Datasheet PDF : 30 Pages
| |||
LC74794, 74794M
Display Control Commands
Display control commands have an 8-bit format and are transferred using the serial input function. Commands consist of
a command identification code in the first byte and command data in the following bytes. The following commands are
supported.
1 COMMAND0: Display memory (VRAM) write address setup command
2 COMMAND1: Display character data write command
3 COMMAND2: Vertical display start position and vertical character size setup command
4 COMMAND3: Horizontal display start position and horizontal character size setup command
5 COMMAND4: Display control setup command
6 COMMAND5: Display control setup command
7 COMMAND6: Synchronizing signal detection setup command
8 COMMAND7 to COMMAND12: Display control setup commands
9 COMMAND13 to COMMAND17: VPS/PDC commands
Display Control Command Table
Command
COMMAND0
Write address setup
COMMAND1
Character write
COMMAND2
Vertical character size and
vertical display start position
COMMAND3
Horizontal character size and
horizontal display start position
COMMAND4
Display control
COMMAND5
Display control
COMMAND6
Synchronizing signal detection
COMMAND7
Display control
COMMAND8
Display control
COMMAND9
Display control
COMMAND10
Display control
COMMAND11
Display control
COMMAND12
Display control
COMMAND13
VPS/PDC control
COMMAND14
VPS/PDC control
COMMAND15
VPS/PDC control
COMMAND16
VPS/PDC control
COMMAND17
VPS/PDC control
First byte
Second byte
Command identification code
Data
Data
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
1
0
0
0 V3 V2 V1 V0 0
0
0 H4 H3 H2 H1 H0
1
0
0
1
0
0
0
0
at c6 c5 c4 c3 c2 c1 c0
1
0
1
0 VS VS VS VS 0 FS VP VP VP VP VP VP
21 20 11 10
5
4
3
2
1
0
1
0
1
1 HS HS HS HS 0
21 20 11 10
HP HP HP HP HP HP
5
4
3
2
1
0
1
1
0
0 TST RAM OSC SYS 0 BLK BLK BLK BK BK RV DSP
MOD ERS STP RST
2
1
0
1
0
ON
1
1
0
1 NP1 NP0 NON INT 0
0 HLF BCL CB PH PH PH
INT
2
1
0
1
1
1
0 SEL MOD DIS MUT 0 RN RN RN SN SN SN SN
0
0 LIN
2
1
0
3
2
1
0
1
1
1
1
0
0
0
0
0 CIN CIN VNP VSP MSK MSK EGL
SEL CTL SEL SEL ERS SEL
1
1
1
1
0
0
0
1
0 LNA LNA LNA LNA LPA LPA LPA
3
2
1
0
2
1
0
1
1
1
1
0
0
1
0
0 LNB LNB LNB LNB LPB LPB LPB
3
2
1
0
2
1
0
1
1
1
1
0
0
1
1
0 LNC LNC LNC LNC LPC LPC LPC
3
2
1
0
2
1
0
1
1
1
1
0
1
0
0
0
0
0
0 LNC MOD LNB MOD
SEL 3 SEL 2
1
1
1
1
0
1
0
1
0
0
0
0
0 SEL SEL CTL
2
1
3
1
1
1
1
0
1
1
0
0 CPA CPA 0 VPM VPM VPM VPM
1
0
3
2
1
0
1
1
1
1
0
1
1
1
0
0
0 HBS HBS BMS EMS DCE
2
1
1
1
1
1
1
0
0
0
0
0 ECV ECV ECV ECV ECV ECV
15 14 13 12 11 5
1
1
1
1
1
0
0
1
0 ECP ECP ECP ECP ECP ECP ECP
19 18 17 16 15 14 13
1
1
1
1
1
0
1
0
0
0 ECP ECP ECP ECP ECP ECP
25 24 23 22 21 20
Once written, the command identification 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 LC74794/M locks into the display
character data write mode, and another first byte cannot be written.
When the CS1 pin is set high, the LC74794/M is set to the COMMAND0 (display memory write address setup mode)
state.
No. 5557-8/30
Share Link: 