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BL22P14 USER MANUAL
BM22P14用户手册
display. When written “1”, the corresponding bit is turn display on; When written “0”, the
corresponding bit is turn display off. Before writing data to memory, the memory is
inconstant.
LCD register- LCDCON
LCDCON($7A): LCD Control Register
.7-.4 PS[3:0] 0000
Dividing frequency of clock source
0000：1/25
0001：1/26
0010：1/27
0011：1/28
0100：1/29
0101：1/210
0110：1/211
0111：1/212
1000：1/213
1001：1/214
1010：1/215
.3-.1 DBS [2:0] 000
Duty/Bias select
000: 1/4 Duty 1/3 Bias(COM0-COM3，SEG0-SEG17)
001: 1/3 Duty 1/3 Bias(COM0-COM2，SEG0-SEG18)
010: 1/2 Duty 1/2Bias(COM0-COM1，SEG0-SEG18)
011: 1/3 Duty 1/2Bias(COM0-COM2，SEG0-SEG18)
others: static(COM0-COM2，SEG0-SEG18)
.1 Not used
.0 LCDON 0
0: all COM/SEG output high
1: LCD can display
Clock of LCD
The clock source of LCD is Fs, and dividing frequency is set by bit 4-7 of LCDCON.
Usually, the frame frequency is set at 25Hz to 250Hz.
If WDT is the clock source, dividing frequency should be1/25
~
1/28.
THE FRAME FREQUENCY WHEN WDT IS CLCOK SOURCE (Hz)
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