SN32F280 Series
32-Bit Cortex-M0 Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 197
Version 1.1
17.7 LCD TIMING CONTROL
The LCD timing control generates the clock for LCD frame rate. The LCD has two clock sources (flcdp): internal 16KHz
RC and external 32.768KHz crystal, controlled by LCDCKS bit. There are 4-level pre-scaler to divide the flcdp to obtain
LCD frame clock source F
LCD
. Each LCD frame length is 2*COM mode*F
LCD
. (COM mode = 4 ~ 8)
LCD Clock Rate (Hz)
= LCD_PCLK
LCDRATE[1:0]
00 (/16)
01 (/32)
10 (/64)
11 (/128)
ILRC 32000Hz
2000
1000
500
250
ELS XTAL 32768Hz
2048
1024
512
256
LCD Frame rate (Hz)
LCDRATE[1:0]
00 (/16)
01 (/32)
10 (/64)
11 (/128)
ILRC 32000Hz
4 COM mode
250 Hz
125 Hz
62.5 Hz
31.25 Hz
ELS XTAL 32768Hz
256 Hz
128 Hz
64 Hz
32 Hz
ILRC 32000Hz
6 COM mode
166.667 Hz
83.333 Hz
41.667 Hz
20.833 Hz
ELS XTAL 32768Hz
170.667 Hz
85.333 Hz
42.667 Hz
21.333 Hz
ILRC 32000Hz
7 COM mode
142.857 Hz
71.429 Hz
35.714 Hz
17.857 Hz
ELS XTAL 32768Hz
146.286 Hz
73.143 Hz
36.571 Hz
18.286 Hz
ILRC 32000Hz
8 COM mode
125 Hz
62.5 Hz
31.25 Hz
15.625 Hz
ELS XTAL 32768Hz
128 Hz
64 Hz
32 Hz
16 Hz
ILRC 32KHz
ELS XTAL
LCDCKS
/16, /32, /64, /128
F
LCDP
LCD_PCLK
LCDEN
LCDRATE[1:0]