BU97930MUV_15 Datasheet, PDF (17/32 Pages) Rohm – Multifunction LCD Segment Driver

BU97930MUV MAX 108 segments (SEG27×COM4)
○OSC external input command (OSCSET)
MSB
LSB
D/C D6 D5 D4 D3 D2 D1 D0 Hex
1st byte Command
1
0
0
1
1
0
0
0 98h
2nd byte Command
0
0
0
0
0 P2 P1 P0
-
Reset
-
00h
Sets the type of clock mode. There are 4 selectable modes including external clock input mode.
Details of this command function are as follows.
Condition
Internal CLK (PWM generation OFF)
P2 P1 P0
0
0
0
Reset state
○
External CLK input for PWM (PWM generation OFF)
0
0
1
Internal CLK (PWM generation ON）
0
1
0
External CLK input for PWM (PWM generation ON)
0
1
1
External CLK input for Display (ROHM use only)
1
*
*
(*: Don‟t care)
(P2,P1,P0)=(0,0,1) : External PWM input mode
CLKIN：external PWM input available.
PWMOUT: “L” Output
*under the (P2,P1,P0)=(0,0,0) condition PWMOUT into same state
(P2,P1,P0)=(0,1,0) : PWM is generated from an internal oscillating frequency
(P2,P1,P0)=(0,1,1) : PWM is generated from an External CLK input CLKIN
PWM width is set by PWMSET command.
The relation of OSC function control by each command is as follows:
CLKIN terminal
External clock
External PWM
Integrated OSC
PWM
generation
LED
OSCSET
command
PWMSET
command
Figure 10. OSC External Input
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TSZ02201-0A0A2D300060-1-2
10.Apr.2015 Rev.004