BU91R63CH-M3BW Datasheet, PDF (2/37 Pages) Rohm – Low Duty LCD Segment Driver

BU91R63CH-M3BW Max 176 segments (SEG44 x COM4)
Block Diagram / Pin Description
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VLCD
LCD Voltage Generator
Common
Driver
Segm ent
Driver
V0
LCD
BIAS
Selector
Common
Counter
Blink
Tim ing
Generator
DDRAM
OSCIN
VDD
VSS
Oscillator
Power On
Reset
Command
Register
Command
Data Decorder
Serial Interface
IF Filter
Figure 2. Block Diagram
Table 1. Pin Description
Terminal name
I/O
Function
Handling
when unused
POR enable setting
T0
I
VDD: POR disable ^(Note)
VSS: POR enable
T1
I
Test input (ROHM use only)
Must be connected to VSS.
T2
I
Test input (ROHM use only)
Must be connected to VSS.
VSS
VSS
VSS
DUMMY
-
Open
OPEN
DUMMY1, 2
-
Can be used for COG resistance measurement.
OPEN
OSCIN
SDA
SCL
External clock input
I
External clock and Internal clock can be selected by command
Must be connected to VSS when using internal oscillator
I/O Serial data in-out terminal
I
Serial clock terminal
VSS
-
-
VSS
I
GND
-
VDD
I
Power supply for logic
-
VLCD
I
Power supply for LCD driving circuit
-
SEG0 to 43
O
SEGMENT output for LCD driving
OPEN
COM0 to 3
O
COMMON output for LCD driving
OPEN
(Note) This function is guaranteed by design, not tested in production process. Software Reset is necessary to initialize IC in case of T0=VDD.
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TSZ22111・15・001
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TSZ02201-0P4P0D301380-1-2
10 Feb. 2016 Rev.001