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Figure 15. Vertical Timing
These timing constraints are similar to the VGA functionality presented in a previous chapter,
but the timing specifications have to be strictly respected in order to ensure the correct
functionality of the device.
Capacitive Touchscreen
The capacitive touch panel uses an FT5x16 series controller, with which the user can
communicate through an I2C protocol. Similar to the LCD the touch connects to the board using
a strip connector with the following pinout:
Horizontal pulse
width
Min. thpw — 1 — CLKIN
Typ. — — — CLKIN
Max. — 40 — CLKIN
Horizontal back porch thbp 46 46 46 CLKIN
Horizontal front porch thfp 16 210 354 CLKIN
Table 17. Vertical Timing
Vertical Input Timing
Parameter Symbol Va lu e Unit
Min. Typ. Max.
Vertical display area tvd – 480 – HS
Vertical line period tv 510 525 650 HS
Vertical pulse width tvpw 1 – 20 HS
Vertical back porch tvbp 23 23 23 HS
Vertical front porch tvfp 7 22 147 HS
Table 16. Horizontal Timing (Continued)
Horizontal Input Timing
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