BU9796AFS-E2 Datasheet, PDF (11/32 Pages) Rohm – Standard LCD Segment Driver

BU9796Axxx Series MAX 80 segments (SEG20×COM4)
Datasheet
<BU9796AMUV>
This device has Display Data RAM (DDRAM) of 12×4=48bit.
The relationship between data input and display data, DDRAM data and address are as follows;
Slave address
Command
S 01111100 A 0 0000000 _{A a b c d e f g h A i j k l m n o p}
A…P
Display Data
8 bit data will be stored in DDRAM. The address to be written is the address specified by ADSET command, and the
address is automatically incremented in every 4bit data.
Data can be continuously written in DDRAM by transmitting Data continuously.
(When RAM data is written successively after writing RAM data to 13h (SEG19), the address is returned to 00h (SEG0)
by the auto-increment function.
DDRAM address
Dummy data
00 01 02 03 04 ・・・ 0B 0C ・・・ 11h 12h 13h
0a
e
i
m
COM0
1b
f
j
n
BIT
2c
g
k
o
COM1
COM2
3d
h
l
p
SEG0 SEG1 SEG2 SEG3 SEG4
SEG11 SEG12
COM3
SEG17 SEG18 SEG19
Data transfer to DDRAM happens every 4bit data.
So it will be finished to transfer with no need to wait ACK.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥15ï½¥001
11/28
TSZ02201-0A2A0D300100-1-2
13.Jun.2014 Rev.003