Z51F3220FNX Datasheet, PDF (272/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
LCDCRL (LCD Driver Control Low Register) : 99H
7
6
5
4
–
–
DBS3
DBS2
–
–
R./W
R/W
3
DBS1
R/W
2
DBS0
R/W
1
LCLK1
R/W
0
LCK0
R/W
Initial value : 00H
DBS[3:0]
LCLK[1:0]
LCD Duty and Bias Select (NOTE)
DBS3 DBS2 DBS1 DBS0 Description
0
0
0
0
1/8Duty, 1/4Bias (60k ohm)
0
0
0
1
1/6Duty, 1/4Bias (60k ohm)
0
0
1
0
1/5Duty, 1/3Bias (60k ohm)
0
0
1
1
1/4Duty, 1/3Bias (60k ohm)
0
1
0
0
1/3Duty, 1/3Bias (60k ohm)
0
1
0
1
1/3Duty, 1/2Bias (60k ohm)
0
1
1
0
1/3Duty, 1/2Bias (120k ohm)
0
1
1
1
1/2Duty, 1/2Bias (60k ohm)
1
0
0
0
1/2Duty, 1/2Bias (120k ohm)
Other values
Not available
LCD Clock Select (When fWCK(Watch timer clock)= 32.768 kHz)
LCLK1 LCLK0 Description
0
0
fLCD = 128Hz
0
1
fLCD = 256Hz
1
0
fLCD = 512Hz
1
1
fLCD = 1024Hz
NOTE) The LCD clock is generated by watch timer clock (fWCK). So
the watch timer should be enabled when the LCD display is turned on.
PS029902-0212
PRELIMINARY
270