US 11,940,942 B2
Peripheral component interconnect express interface device and operating method thereof
Yong Tae Jeon, Icheon-si (KR); and Ji Woon Yang, Icheon-si (KR)
Assigned to SK hynix Inc., Icheon-si (KR)
Filed by SK hynix Inc., Icheon-si (KR)
Filed on Nov. 15, 2021, as Appl. No. 17/527,062.
Claims priority of application No. 10-2021-0070676 (KR), filed on Jun. 1, 2021.
Prior Publication US 2022/0382706 A1, Dec. 1, 2022
Int. Cl. G06F 13/20 (2006.01); G06F 13/42 (2006.01)
CPC G06F 13/4221 (2013.01) [G06F 2213/0026 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A Peripheral Component Interconnect Express (PCIe) interface device, comprising:
a transaction layer generating a transaction packet for transmission of a transaction;
a data link layer generating a link packet including a protection code and a sequence number for the transaction packet, based on the transaction packet;
a physical layer generating a physical packet based on the link packet and sequentially outputting the physical packet;
a link training module for performing a negotiation for a link coupled through the physical layer, the link training module determining whether a link down, which occurs when a negotiation of a link does not occur, is a link down requested by a host or a link down not requested by the host; maintaining a data information when the link down is not requested by the host; and initializing the data information when the link down is requested by the host; and
a PCIe register storing information about the transaction layer, the data link layer, the physical layer, and the link training module.