BU97550KV-M Datasheet, PDF (22/72 Pages) Rohm – AEC-Q100 Qualified

BU97550KV-M
Datasheet
9. BU: Normal mode/power-saving mode 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_IN/S90 = low (VSS)
COM1 to COM5 = low (VSS)
Shut off current to the LCD drive bias voltage generation circuit
Stop the Internal oscillation circuit
However, serial data transfer is possible when at Power-saving mode.
10. PG1, PG2, PG3, PG4, PG5, PG6, PG7, PG8 and PG9: PWM/General Purpose output control data
This control data bit select either PWM output or General Purpose output of Sx/Px/Gx pins. (x=1 to 9)
PGx(x=1 to 9)
Mode
0
PWM Output
1
General Purpose Output
<PWM<->GPO Changing function>
Normal behavior of changing GPO to PWM is below.
- PWM operation is started by command import timing of DD: 001 during GPO Æ PWM change.
- Please take care of reflect timing of new duty setting of DD: 010 and DD: 011 is from the next PWM.
SCE
DD: 000
DD: 001
DD: 010
DD: 011
DD: 100
DD: 101
GPO ‐‐‐> PWM change
new duty decided timing
PWM/GPO output
start of PWM operation
(PWM waveform in immediate duty)
In order to avoid this operation, please input commands in reverse as below.
SCE
DD:101
DD:100
DD:011
DD:010
next PWM cycle
(PWM waveform in new duty)
DD:001
DD:000
new duty decided timing
GPO ‐‐_＞PWM change
PWM/GPO output
Start of PWM operation
(PWM waveform on new duty)
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TSZ02201-0P4P0D300980-1-2
30.Mar.2015 Rev.001