BU97981KV-E2 Datasheet, PDF (14/50 Pages) Rohm – Multi-function LCD Segment Drivers

BU97981xxx Series MAX 196 segments (SEG49xCOM4)
Datasheet
Example of Recommended Circuit – Continued
(BU97981MUV)
1. LED/GPO Using Case
LED ： 3port
GPO ： 5port
LCD ： 136segments
VLED
5.0V
3.3V
VLCD
VDD
SEG39 (LED1)
SEG40 (LED2)
SEG41 (LED3)
BU97981MUV
Regarding resistor value
Please detect the value according to
input current value. (current MAX =
20mA)
SEG38(GPO1)～
SEG34(GPO5)
Other
device
VSS1
VSS2
TEST1 CSB SCL SD INHb CLKIN
SEG0～SEG33
COM0～COM3
LCD
Input signal from controller
CLKIN
External CLK input terminal
In case being unused, connect to VSS.
2. SEG Output Only Case
5.0V
3.3V
VLCD
VDD
BU97981MUV
VSS1
VSS2
TEST1 CSB SCL SD INHb CLKIN
SEG0～SEG41
COM0～COM3
LCD
Input signal from controller
CLKIN
External CLK input teminal
In case being unused, connect to VSS.
Figure 13. BU97981MUV E.g. of Recommended Circuit
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10.Apr.2015 Rev.006