Interface circuit and packet transmission method thereof
A packet transmission method includes packaging a plurality of data in the form of a payload; storing information on whether the plurality of data are packaged in a header, the payload or a CRC area including a transmission error check code of the plurality of data; combining the header, the payload, and the CRC area with each other to generate a transaction layer packet; and outputting a packet including the transaction layer packet.
1. An interface circuit comprising:
a receiver configured to receive data, the data being one of a single first packet and a plurality of separate first packets, the single first packet having a single header and a plurality of write data packaged into a first transaction layer packet therein such that each of the write data is associated with a different address of a nonvolatile memory, and the plurality of separate first packets having a plurality of read data dispersed therebetween and the plurality of separate first packets having associated separate headers;
a processor configured to,
determine if the received data is the single first packet or the plurality of separate first packets,
if the processor determines that the received data is the single first packet, then decode the single first packet to extract the plurality of write data and associated meta data, the associated meta data indicating the different addresses, and
if the processor determines that the received data is the plurality of separate first packets, then generate a physical layer packet by packaging the plurality of read data into a payload of a second transaction layer packet such that the payload only includes the plurality of read data from the plurality of separate first data packets without the associated separate headers, setting a bit in the header of the second transaction layer packet to indicate that the plurality of data is packaged into the payload and attaching additional information to both ends of the second transaction layer packet to generate the physical layer packet, the additional information including at least a pair of framing bits indicating a start and an end of the second transaction layer packet included in the physical layer packet; and
a transmitter configured to transmit the physical layer packet or the extracted plurality of write data.
2. The interface circuit of claim 1 , wherein the processor is configured to determine that the received data is the single first packet based on information contained within the first transaction layer packet.
3. The interface circuit of claim 2 , wherein the processor is configured to determine that the received data is the single first packet based on information contained within one or more reserved bits of the header of the first transaction layer packet.
4. The interface circuit of claim 1 , wherein the interface circuit is configured to receive the data and transmit the physical layer packet based on a Peripheral Component Interconnect Express (PCIe) protocol.
5. The interface circuit of claim 1 , wherein the nonvolatile memory connected thereto is a three-dimensional memory array such that the nonvolatile memory is monolithically formed in one or more physical levels of memory cells having word lines and/or bit lines shared between the physical levels, and the memory cells have active areas disposed above a silicon substrate and include a charge trap layer.