BU97931FV Datasheet, PDF (16/32 Pages) Rohm – Multifunction LCD Segment Driver

BU97931FV MAX 112 segments (SEG28×COM4)
○RAM WRITE (RAMWR)
1st byte Command
2nd byte Command
MSB
D/C D6
1
0
n byte Command
D5 D4 D3 D2
1
0
0
0
Display data
・・・・
Display data
LSB
D1 D0 Hex
0
0 A0h
Reset
-
Random
Random
Input data, sending after 1st byte command, are used as Display data. And display data are sent every 4 bits. Please set
this command after the ADSET command.
○Blink RAM WRITE (BLKWR)
MSB
LSB
D/C D6 D5 D4 D3 D2 D1 D0 Hex Reset
1st byte Command
1
1
0
0
0
0
0
0 C0h
-
2nd byte Command
Blink data
・・・・
Random
n byte Command
Blink data
Random
Input data, sending after 1st byte command, are used as Display data. And display data are sent every 4 bits. Please set
this command after the BLKADSET command.
○All Pixel ON (APON)
1st byte Command
MSB
LSB
D/C D6 D5 D4 D3 D2 D1 D0 Hex
1
0
0
1
0
0
0
1 91h
Reset
-
After sending the command, all SEG outputs set display on state regardless of the DDRAM data.
(This command affect to the SEG output terminal only (except GPO and LED output) )
○All Pixel OFF (APOFF)
1st byte Command
MSB
LSB
D/C D6 D5 D4 D3 D2 D1 D0 Hex
1
0
0
1
0
0
0
0 90h
Reset
-
After sending the command, all SEG outputs set display off state regardless of the DDRAM data.
(This command affects the SEG output terminals only (except GPO and LED outputs) )
○All Pixel ON/OFF mode off (NORON)
MSB
LSB
D/C D6 D5 D4 D3 D2 D1 D0 Hex
1st byte Command
1
0
0
1
0
0
1
1 93h
Reset
-
After sending the command, all SEG outputs are released from APON/APOFF state.
And SEG port outputs signal follows DDRAM data.
(This command affects the SEG output terminals only (except GPO and LED output) )
After reset sequence or SWRESET, all outputs are set to NORON state.
○Software Reset (SWRST)
MSB
LSB
D/C D6 D5 D4 D3 D2 D1 D0 Hex
1st byte Command
1
0
0
1
0
0
1
0 92h
Reset
-
After sending the command, device is set to the default state.
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TSZ02201-0A0A2D300070-1-2
10.Apr.2015 Rev.004