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823
Timing
Notes:
1CLCDCLK is selected from 5 possible sources:
— lcdclk/2 (lcdclk is an external oscillator)
— AHB clock
— AHB clock/2
— AHB clock/4
— AHB clock/8
See the LCD Controller chapter for acceptable clock frequencies for the different display configurations.
2The polarity of CLLP, CLFP, CLCP, and CLAC can be inverted using control fields in the LCDTiming1 register.
3The CPL field in the LCDTiming2 register must also be programmed to T5-1.
4The PPL field in the LCDTiming0 register must also be programmed correctly.
L18 CLCP to data/control
(see notes 7 and 8) -1.0 (min)
+1.5 (max)
ns
L19 CLCP high (see notes 8, 9) 50%±0.5ns ns
L20 CLCP low (see notes 8, 9) 50%±0 .5ns ns
L21 TFT VSYNC active to HSYNC
active (see note 8) -0.1ns (min)
+0.1ns (max)
ns
L22 TFT VSYNC active to HSYNC
inactive LCDTiming0 HSW CLCP periods
L23 STN VSYNC active to HSYNC
inactive LCDTiming0 STN color: 14+HSW+HFP
STN Mono8:
6+HSW+HFP
STN Mono4:
10+HSW+HFP
CLCP periods
L24 STN HSYNC inactive to
VSYNC inactive LCDTiming0 HBP+1 CLCP periods
L25 STN VSYNC inactive to
HSYNC active LCDTiming0 STN color: HFP+13
STN Mono8: HFP+15
STN Mono4: HFP+9
CLCP periods
L26 CLCP period 12.5ns (min) ns
Parm Description Register Value Units
Table 474: LCD timing parameters