BU97931FV Datasheet, PDF (2/32 Pages) Rohm – Multifunction LCD Segment Driver

BU97931FV MAX 112 segments (SEG28×COM4)
●Block Diagram / Pin Configuration / Pin Description
VLCD
CLKIN
VDD
VSS
COM0……COM3 SEG0…..22, SEG23…27
LED
LCD voltage
Generator
common
driver
Segment Segment
driver driver/GPO
LED
Driver
VSS
OSCILLATOR
LCD
BIAS
SELECTOR
common blink timing
counter generator
GPO
Controller
DDRAM
GPO data latch
PW M
Generator
Power On Reset
Command register
Data Decoder
serial inter face
IF FILTER
CSB
SD
SCL
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG4
SEG3
SEG2
SEG1
SEG0
COM3
COM2
COM1
COM0
VLCD
CLKIN
VDD
SD
SCL
CSB
VSS
LED
SEG27
SEG26
SEG25
Figure 2. Block Diagram
Figure 3. Pin Configuration (TOP VIEW)
Terminal
CSB
Terminal
number
26
SCL
27
SD
28
VDD
29
CLKIN
30
VSS
25
VLCD
31
COM0 to 3
SEG0 to 22
SEG23 to 27
32 to 35
36 to 40
1 to 18
19 to 23
LED
24
Table 1 Pin Description
I/O
Unused
case
I
-
Chip select: "L" active
Function
I
-
Serial data transfer clock
I
-
Input serial data
-
-
Power supply for LOGIC
I
OPEN / VSS
External clock input terminal (for display/PWM using selectable);
Support Hi-Z input mode at internal clock mode
-
-
GND
-
-
Power supply for LCD
O
OPEN
COMMON output for LCD
O
OPEN
SEGMENT output for LCD
O
OPEN
SEGMENT output for LCD/GPO
O
OPEN
LED driver output
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥15ï½¥001
2/28
TSZ02201-0A0A2D300070-1-2
10.Apr.2015 Rev.004