Z51F3220FNX Datasheet, PDF (273/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
LCDCCR (LCD Driver Contrast Control Low Register) : 9BH
7
6
5
4
3
LCTEN
–
–
–
VLCD3
R/W
–
–
–
R/W
2
VLCD
R/W
1
VLCD1
R/W
0
VLCD0
R/W
Initial value : 00H
LCTEN
VLCD[3:0]
Control LCD Driver Contrast
0
LCD Driver Contrast disable
1
LCD Driver Contrast enable
VLC0 Voltage Control when the contrast is enabled
VLCD3 VLCD 2 VLCD 1 VLCD 0 Description
0
0
0
0
VLC0 = VDD x 16/31 step
0
0
0
1
VLC0 = VDD x 16/30 step
0
0
1
0
VLC0 = VDD x 16/29 step
0
0
1
1
VLC0 = VDD x 16/28 step
0
1
0
0
VLC0 = VDD x 16/27 step
0
1
0
1
VLC0 = VDD x 16/26 step
0
1
1
0
VLC0 = VDD x 16/25 step
0
1
1
1
VLC0 = VDD x 16/24 step
1
0
0
0
VLC0 = VDD x 16/23 step
1
0
0
1
VLC0 = VDD x 16/22 step
1
0
1
0
VLC0 = VDD x 16/21 step
1
0
1
1
VLC0 = VDD x 16/20 step
1
1
0
0
VLC0 = VDD x 16/19 step
1
1
0
1
VLC0 = VDD x 16/18 step
1
1
1
0
VLC0 = VDD x 16/17 step
1
1
1
1
VLC0 = VDD x 16/16 step
NOTES) The LCD contrast step is based on 1/4 bias.
1/4 bias : VDD x (16/31 – VLC[3:0])
1/3 bias : VDD x (12/27 – VLC[3:0])
1/2 bias : VDD x (8/23 – VLC[3:0])
PS029902-0212
PRELIMINARY
271