BU97981KV-E2 Datasheet, PDF (3/50 Pages) Rohm – Multi-function LCD Segment Drivers

BU97981xxx Series MAX 196 segments (SEG49xCOM4)
Block Diagram / Pin Arrangement / Pin Description
Datasheet
BU97981MUV
VLCD
LCD voltage
Generator
Ref Voltage
Circuit
Vreg
VSS2
COM0……….CCOOMM3 SEG0 …………………………….SEG48
3
Common
Driver
Segment
Segment Segment
Driver
Driver/ GPO Driver/ LED
LCD
BIAS
SELECTOR
Common
counter
Blink timing
generator
GPO / LED
Controller
DDRAM
GPO data latch
PW M
Generator
INHb
CLKIN
VDD
VSS
VSS
CR oscillator
(typ:40.96KHz)
OSC block
Clock
Divider
(div.2)
TEST1
Power On
Reset
Command register
Data Decode
Serial inter face
IF FILTER
CSB
SD
SCL
Output
Controller
PWMOUT
CLKIN
VSS2
SEG41
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
1 2 3 4 5 6 7 8 9 10 11 12 13 14
56
15
55
16
54
17
53
18
52
19
51
20
50
EXT-PAD
21
49
22
48
23
47
24
46
25
45
26
44
27
43
28
42 41 40 39 38 37 36 35 34 33 32 31 30 29
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
Figure 4. Block Diagram
Figure 5. Pin Configuration (BOTTOM VIEW)
Table 2. Pin Description
Terminal
CSB
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
TEST1
4
-
-
Power supply for LOGIC
56
I
OPEN / VSS
External clock input terminal (for display/PWM using selectable)
Support Hi-Z input mode at internal clock mode
5
I
-
TEST terminal (Please connect VSS terminal)
VSS1
6
-
-
GND
VLCD
8
-
-
Power supply for LCD
Display turning on/off select terminal
H: turning on display, L: turning off display
INHb
7
I
VDD
INHb = “L”: All SEG/COM terminal : output VSS level
GPO terminal : output VSS level
LED drive terminal : output Hi-Z
COM0~3
9-12
O
OPEN
COMMON output for LCD
SEG0~11
13-24
O
OPEN
SEGMENT output for LCD
SEG12~38
25-51
O
OPEN
SEGMENT output for LCD/GPO
SEG39~41
52-54
O
OPEN
SEGMENT output for LCD/LED driver
VSS2
55
-
GND
GND (for SEG39-41 / LED driver)
EXT-PAD
-^(Note1)
-
VSS
substrate
(Note1) To radiate heat, please contact a board with the EXT-PAD which is located at the bottom side of
VQFN56AV8080 package.
Please supply VSS level or Open state as the input condition for this PAD.
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TSZ02201-0A2A0D300110-1-2
10.Apr.2015 Rev.006