US 12,174,773 B2
Transmission control architecture between sensing device and host device
Chung-Hang Tsai, HsinChu (TW); Yi-Ching Yeh, HsinChu (TW); and Jack Lee, HsinChu (TW)
Assigned to Realtek Semiconductor Corp., HsinChu (TW)
Filed by Realtek Semiconductor Corp., HsinChu (TW)
Filed on Jan. 10, 2022, as Appl. No. 17/571,559.
Claims priority of provisional application 63/142,967, filed on Jan. 28, 2021.
Claims priority of application No. 110138521 (TW), filed on Oct. 18, 2021.
Prior Publication US 2022/0237140 A1, Jul. 28, 2022
Int. Cl. G06F 13/40 (2006.01); G06F 13/38 (2006.01); G06F 13/42 (2006.01)
CPC G06F 13/4068 (2013.01) [G06F 13/385 (2013.01); G06F 13/4282 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A sensing device, comprising:
a sensed information transmitting circuit, configured to convert sensed information into a transmission signal compliant with a signal format of a first transmission protocol;
a control information slave circuit, configured to convert a received signal received from a signal transmission interface into control information according to a second transmission protocol, thereby to configure the sensing device, wherein the signal transmission interface is a 2-channel interface; and
a mode switching circuit, coupled to the sensed information transmitting circuit and the control information slave circuit, configured to activate one of the sensed information transmitting circuit and the control information slave circuit based on one of a signal on a clock channel of the signal transmission interface, a signal on a data channel of the signal transmission interface or a signal on a power rail of the sensing device, thereby to transmit or receive the transmission signal or the received signal through the signal transmission interface;
wherein if the signal on the clock channel of the signal transmission interface reduces below a threshold in frequency and then remains direct current for a period of time, the control information slave circuit is activated to receive the received signal through the signal transmission interface to configure the sensing device; if the frequency of the signal on the clock channel of the signal transmission interface is higher than the threshold, the sensed information transmitting circuit is activated to transmit the transmission signal.