US 11,687,475 B1
Large touch display integrated circuit and operation method thereof
Shan-Chieh Wen, Tainan (TW); Ming-Huai Weng, Tainan (TW); Guei-Lan Lin, Tainan (TW); Che-Hao Chiang, Tainan (TW); and Chi-Cheng Lin, Tainan (TW)
Assigned to HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed by HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed on Dec. 22, 2021, as Appl. No. 17/558,600.
Int. Cl. G06F 13/362 (2006.01); G06F 11/10 (2006.01); G06F 9/4401 (2018.01); G06F 13/42 (2006.01)
CPC G06F 13/362 (2013.01) [G06F 9/4401 (2013.01); G06F 11/1004 (2013.01); G06F 13/4282 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A large touch display integrated (LTDI) circuit, suitable as a slave IC of an SPI architecture, the LTDI circuit comprising:
a first open-drain circuit having an output terminal configured to be coupled to a correctness wire outside the LTDI circuit, wherein the correctness wire is also coupled to a first input terminal of a master IC of the SPI architecture, and a potential of the correctness wire is pulled up by a first pull-up resistor; and
a reload circuit coupled to an input terminal of the first open-drain circuit and configured to check a correctness of a boot up code from the master IC to generate a correctness check result, wherein the reload circuit returns the correctness check result to the master IC via the first open-drain circuit and the correctness wire.