HT16C21
Set as VLCD pin
When the internal VLCD voltage adjustment function is disabled, an external resistor must be connected between
the VLCD and VDD pins to determine the supplied bias voltage.
● 1/4 duty
VDD
VR
0.1uF
VDD
HOST
VSS
VDD
VLCD
4.7KΩ
4.7KΩ
COM0~COM3
COM0~COM3
SCL
HT16C21
LCD panel
SDA
SEG0~SEG18
SEG0~SEG18
VSS
VSS
● 1/8 duty
VDD
VR
0.1uF
VDD
VDD
VLCD
4.7KΩ
4.7KΩ
COM0~COM7
COM0~COM7
SCL
HOST
HT16C21
LCD panel
SDA
SEG4~SEG18
SEG0~SEG14
VSS
VSS
VSS
Rev. 1.00
25
November 22, 2011