BU97530KVT Datasheet, PDF (17/59 Pages) Rohm – Built-in OSC circuit

BU97530KVT
Datasheet
5. DT: 1/5 duty drive, 1/4 duty drive, 1/3 duty drive or 1/1 duty(static) drive switching control data
These control data bits select either 1/5 duty drive, 1/4 duty drive, 1/3 duty drive or 1/1 duty (static) drive
DT0
DT1
Duty drive scheme
0
0
1/1 duty (static) drive
0
1
1/3 duty drive
1
0
1/4 duty drive
1
1
1/5 duty drive
6. FC0, FC1, FC2 and FC3: Common/Segment output waveform frame frequency switching control data
These control data bits set the frame frequency for common and segment output waveforms.
FC0
FC1
FC2
FC3
Frame Frequency fo(Hz)
0
0
0
0
fosc^(Note13) / 12288
0
0
0
1
fosc / 10752
0
0
1
0
fosc / 9216
0
0
1
1
fosc / 7680
0
1
0
0
fosc / 6144
0
1
0
1
fosc / 4608
0
1
1
0
fosc / 3840
0
1
1
1
fosc / 3072
1
0
0
0
fosc / 2880
1
0
0
1
fosc / 2688
1
0
1
0
fosc / 2496
1
0
1
1
fosc / 2304
1
1
0
0
fosc / 2112
1
1
0
1
fosc / 1920
1
1
1
0
fosc / 1728
1
1
1
1
fosc / 1536
(Note13) fosc: Internal oscillation frequency (600 [kHz] typ.)
7. OC: Internal oscillator operating mode/External clock operating mode switching control data
OC
Operating mode
In/Out pin(OSC/S90) status
0
Internal oscillator
S90 (segment output)
1
External Clock
OSC (clock input)
8. SC: Segment on/off switching control data
This control data bit controls the on/off state of the segments.
SC
Display state
0
On
1
Off
Note that when the segments are turned off by setting SC to “1”, the segments are turned off by outputting segment
off waveforms from the segment output pins.
9. BU0,BU1 and BU2: Normal mode/power-saving mode switching control data
These control data bits select either normal mode or power-saving mode.
BU0 BU1 BU2
Mode
OSC Oscillator
Segment outputs Output Pin States During Key Scan Standby
Common outputs KS1 KS2 KS3 KS4 KS5 KS6
0
0
0 Normal
Operating
Operating
H
H
H
H
H
H
0
0
1
L
L
L
L
L
H
0
1
0
L
L
L
L
H
H
0
1
1
1
0
0
1
0
1
Power-
saving
Stopped
Low(VSS)
L
L
L
H
H
H
L
L
H
H
H
H
L
H
H
H
H
H
1
1
0
H
H
H
H
H
H
1
1
1
H
H
H
H
H
H
Power-saving mode status: S1/P1/G1 to S9/P9/G9 = active only General Purpose output
S10 to OSC/S90 = low (VSS)
COM1 to COM5 = low (VSS)
Stop the LCD drive bias voltage generation circuit
Stop the Internal oscillation circuit
However, serial data transfer is possible when at Power-saving mode.
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TSZ02201-0P4P0D300570-1-2
02.Mar.2015 Rev.003