BU97930MUV_15 Datasheet, PDF (2/32 Pages) Rohm – Multifunction LCD Segment Driver

BU97930MUV MAX 108 segments (SEG27×COM4)
●Block Diagram / Pin Configuration / Pin Description
VLCD
INHb
CLKIN
VDD
VSS
COM0……COM3 SEG0 …...22 SEG23...26
LED
LCD voltage
Generator
common
driver
Segment Segment
driver driver/GPO
LED
driver
VSS
CR Oscillator
(typ=40.96kHz
)
OSC block
LCD
BIAS
SELECTOR
common blink timing
counter generator
GPO
Controlle
r
DDRAM
GPO data latch
PWM
Generator
clock
divider
(Div.2)
Power On
Reset
Command
Data register
Decoder
serial inter face
IF FILTER
VSS ⁴⁰
LED ³⁹
SEG26 ³⁸
SEG25 ³⁷
SEG24 ³⁶
SEG23 ³⁵
SEG22 ³⁴
SEG21 ³³
SEG20 ³²
SEG19 ³¹
CSB
SD
SCL
EXT-PAD
11 _COM3
12 _SEG0
13 _SEG1
14 _SEG2
15 _SEG3
16 _SEG4
17 _SEG5
18 _SEG6
19 _SEG7
20 _SEG8
Figure 2. Block Diagram
Figure 3. Pin Configuration (BOTTOM VIEW)
Terminal
CSB
Table 1 Pin Description
Terminal
number
I/O
unused case
1
I
-
Chip select: "L" active
Function
SCL
2
I
-
Serial data transfer clock
SD
3
I
-
Input serial data
VDD
CLKIN
VSS
4
-
-
Power supply for LOGIC
6
I
OPEN / VSS
External clock input terminal (for display/PWM using selectable);
Support Hi-Z input mode at internal clock mode
40
-
-
GND
VLCD
7
-
INHb
5
I
COM0 to 3 8 to 11 O
-
VDD
OPEN
Power supply for LCD
Display turning on/off select terminal
H: turning on display, L: turning off display
INHb = “L”: All SEG/COM terminals : output VSS level
GPO terminal : output VSS level
LED drive terminal : output Hi-Z
COMMON output for LCD
SEG0 to 22 12 to 34 O
OPEN
SEGMENT output for LCD
SEG23 to 26 35 to 38 O
OPEN
SEGMENT output for LCD/GPO
LED
39
O
OPEN
LED driver output
EXT-PAD
-
-
VSS
substrate
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥15ï½¥001
2/28
TSZ02201-0A0A2D300060-1-2
10.Apr.2015 Rev.004