BU9728 Ver la hoja de datos (PDF) - ROHM Semiconductor
Número de pieza
componentes Descripción
Fabricante
BU9728 Datasheet PDF : 24 Pages
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● Block Diagram (BU9728AKV)
RESET
SD
SCK
C/D
CS
Serial
Interface
Addres s
Counter
Display Data RAM
(DD RAM)
Com m and/Data
Regis ter
Command
Decoder
Tim ing
Generator
Com m on
Counter
LCD Driver
Bias Circuit
LCD
Segm ent
Driver
32bits
VDD
V1
V2
V3
VSS
SEG0
SEG1
SEG31
LCD
Common
Driver
4bits
COM0
COM1
COM2
COM3
●Pin Arrangement (BU9728AKV)
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
36 35 34 33 32 31 30 29 28 27 26 25
37
24
38
23
39
22
40
21
41
20
42
19
43
18
44
17
45
16
46
15
47
14
48
13
1 2 3 4 5 6 7 8 9 10 11 12
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
RESET
COM3
COM2
COM1
Fig. BU9728AKV-5 Block diagram
arrangement
Fig. BU9728AKV-6 Pin
● Terminal description (BU9728AKV)
Terminal
OSC1
OSC2
V1～V3
No.
1
2
3～5
Type
Function
I Int clock use mode, connect resister between OSC1 and OSC2.
O Ext clock use mode, input clock from OSC1, OSC2 keep OPEN.
Power supply for LCD driving.
Keep VDD≧V1≧V2≧V3≧VSS condition.
VSS
6
VSS terminal
VDD
7
VDD terminal
SCK
8
I Serial clock input
SD
9
_________
CS
10
______________
C/D
11
COM0～3 12～15
RESET
SEG0～
31
16
17～48
I Serial data input
I Chip select input “L”: active
I
Command data judgment input
“L”: display data, “H”: command
O LCD COMMON output
Reset input terminal.
I It will be initialized with "L" level input.
Reset address counter, Set display off status.
O LCD SEGMENT output
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