BU97930MUV Datasheet, PDF (14/24 Pages) Rohm – Multifunction Segment Drivers

BU97930MUV,BU97931FV,BU9798KV,BU9798GUW,BU97500KV
Technical Note
<BU9798KV>
●Block diagrams
VLCD
LCD voltage
Generator
Ref Voltage
Circuit
Vreg
INHb
CLKIN
VDD
VSS
VSS
OSCILLATOR
TEST1
VSS2
COM0……COM3 SEG0 ……………………………… SEG48
common
driver
Segment Segment Segment
driver driver/GPO driver/LED
LCD
BIAS
SELECTOR
common blink timing
counter generator
GPO/LED
Controller
DDRAM
GPO data latch
PW M
Generator
Power On Reset
Command register
Data Decoder
serial inter face
IF FILTER
CSB
SD
SCL
Output
Controller
PW MOUT
●Pin arrangement
49
SEG36
SEG37
SEG38
SEG39
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG48
VSS2
PWMOUT
CLKIN
64
32
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
17
Fig.9 Block Diagram (BU9798KV)
Fig.10 Pin Arrangement (BU9798KV)
●Terminal description
Terminal
Terminal
number
CSB
1
SCL
2
SD
3
VDD
4
CLKIN
64
TEST1
5
VSS1
6
VLCD
8
INHb
7
PWMOUT
COM0 ~ 3
SEG0 ~ 14
SEG15 ~ 45
SEG46 ~ 48
VSS2
63
9-12
13-27
28-58
59-61
62
I/O unused case
Function
I
VDD
Chip select: "L" active
I
VSS
Serial data transfer clock
I
VSS
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
I
-
TEST terminal (Please connect VSS terminal)
-
-
GND
-
-
Power supply for LCD
Display turning on/off select terminal
H: turning on display, L: turning off display
I
VDD
INHb = “L”: All SEG/COM terminal : output VSS level
GPO terminal : output VSS level
LED drive terminal : output Hi-Z
O
OPEN
PWM output for LED2 group
O
OPEN
COMMON output for LCD
O
OPEN
SEGMENT output for LCD
O
OPEN
SEGMENT output for LCD/GPO
O
OPEN
SEGMENT output for LCD/LED driver
-
GND
GND (for SEG46-48 / LED driver)
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© 2010 ROHM Co., Ltd. All rights reserved.
14/23
2010.04 - Rev.A