Spark Logic

HX8357B TFT LCD controller connection guide

HX8357B TFT LCD controller CFAF320480C4-035T · FPC-50 wiring guide with power, signal assignments, and bench checks.

CFAF320480C4-035T · FPC-50

50 contacts Current package

Himax Technologies ·

Wire the Crystalfontz module for 4-wire SPI

Required

Tie IM2:IM0 high for 4-wire SPI. Connect every power and ground contact, and use six current-limited sinks on the common-anode backlight.

Bench checks

  • Verify the three strap inputs and pulse RST low after power is stable. Confirm backlight current separately from the module logic current.
  • Load the initialization for this exact module and send a filled test window. The controller receives command bytes with DC low, then parameters and pixel data with DC high.

Crystalfontz CFAF320480C4-035T datasheet, 2017-09-07, §§ 6, 8 and 10. Himax HX8357-B Preliminary V01, host-interface and command sections.

CFAF320480C4-035T · FPC-50 wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

CFAF320480C4-035T · FPC-50
Locate contact 1 in the module’s mechanical drawing and check the mating connector contact side.
Selected pin details

49 · LEDK6

LED cathode · Control

Use a separate current-limited return for this backlight branch.

Crystalfontz CFAF320480C4-035T datasheet, 2017-09-07, §§ 6, 8 and 10.

Electrical limits · Pin in the reference

Models and documents

This map applies to the Crystalfontz non-touch FPC-50 module with HX8357B or a documented compatible controller. The touch-panel version has different assignments on contacts 39–42.

CFAF320480C4-035T
3.5-inch 320 × 480 display module without touch panel.