BU97941FV_15 Datasheet, PDF (2/27 Pages) Rohm – Multifunction LCD Segment Driver

BU97941FV MAX 104 segments (SEG26×COM4)
●Block Diagram / Pin Configuration / Pin Description
VLCD
VDD
VSS
LCD voltage
Generator
COM0……COM3 SEG0……SEG25
common
driver
Segment
driver
LED4...LED1
LED
Driver
LCD
BIAS
SELECTOR
common
counter
DDRAM
VSS
OSCILLATOR
Power On Reset
External clock line
Command register
Data Decoder
serial inter face
IF FILTER
CSB
SD SCL/CLKIN
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
COM3
COM2
COM1
COM0
VLCD
VDD
SD
SCL
CSB
VSS
LED4
LED3
LED2
LED1
Figure 2. Block Diagram
Figure 3. Pin Configuration (TOP VIEW)
Pin Name
CSB
SCL
SD
VDD
VSS
VLCD
COM0 to 3
SEG0 to 25
LED1 to 4
Pin No.
26
27
28
29
25
30
31 to 34
1 to 20
35 to 40
21 to 24
Table 1 Pin Description
Setting
I/O when not in
use
Function
I
VDD
Chip select: "L" active
I
VSS
Serial data transfer clock
I
VSS
Input serial data
-
-
Power supply for LOGIC
External clock input terminal (for display/PWM using
-
-
selectable)
Support Hi-Z input mode at internal clock mode
-
-
GND
O
OPEN Power supply for LCD
O
OPEN COMMON output for LCD
O
OPEN LED driver output
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TSZ02201-0A0A2D300080-1-2
10.Apr.2015 Rev.004