Datasheet

FS98O22
Rev. 1.6 119/146
13. LCD Driver
FS98O22 embeds a LCD driver. The control signal are COM1~COM4 and SEG1~SEG12. The user could set
the SEG register flags to drive a static or multiplexed LCD panel. FS98O22 LCD driver could drive up to 20
segments multiplexed with up to 4 commons. Please see Figure 13-1.
Figure 13-1 LCD driver control block
FS98O22 LCD driver has 4 kinds of control mode: static, 1/2 duty, 1/3 duty and 1/4 duty. The control mode
depends on the LCD panel The user could setup LCD_DUTY[1:0] register flags to choose one. Take a 1/4 duty
control mode number LCD for example, if the user wants to show number 9 in LCD, the SEG 1 includes 4
commons as [1,0,1,1] and the SEG2 include 4 commons as [1,1,1,1]. Please see Figure 13-2.
Static mode 1/2 duty mode 1/3 duty mode 1/4 duty mode
Figure 13-2 LCD control mode
4X20
LCD
FS98O22
COM1~COM4
SEG1 ~ SEG20
FORTUNE'
Properties
For Reference Only