US Patent No. 9,264,368

CHIP-TO-CHIP COMMUNICATIONS


Patent No. 9,264,368
Issue Date February 16, 2016 
Title Chip-to-chip Communications
Inventorship Ian Swarbrick, Santa Clara, CA (US)
Joseph Jun Cao, Los Gatos, CA (US)
Assignee Marvell World Trade Ltd., St. Michael (BB)

Claim of US Patent No. 9,264,368

1. A transmitter device comprising:
a hardware replay buffer to store a data packet, wherein the data packet includes an overhead portion and a payload portion;
and

circuitry configured to
transmit the overhead portion, to a receiver device, including one or more overhead bits indicating a total bit count of the
payload portion to be received during transmission of the payload portion;

start the transmission of the payload portion to the receiver device through a physical serial communication link;
receive, from a host device and prior to completion of the transmission of the payload portion, a priority data packet having
a higher priority than the data packet;

perform an interruption, before a transmission of the priority data packet, of the transmission of the payload portion in
response to the receiving of the priority data packet, such that a remainder data of the payload portion in the hardware replay
buffer remains to be transmitted upon resumption of the transmission of the payload portion;

record a memory location within the hardware replay buffer corresponding to the interruption, wherein the memory location
references a first bit of the remainder data of the payload portion of the data packet;

transmit the priority data packet to the receiver device;
after the priority data packet has been transmitted, transmit another overhead portion, to the receiver device, including
one or more overhead bits indicating a bit count of the remainder data of the payload portion to be received during resumed
transmission of the payload portion; and

after transmission of the another overhead portion resume the transmission to the receiver device of the payload portion starting
from the recorded memory location.