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1. WO2020112315 - SECURE DIGITAL (SD) DIRECT COMMAND FOR IMPROVING THROUGHPUT WITH A REDUCED MEMORY FOOTPRINT

Publication Number WO/2020/112315
Publication Date 04.06.2020
International Application No. PCT/US2019/059913
International Filing Date 05.11.2019
IPC
G06F 13/42 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
13Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
38Information transfer, e.g. on bus
42Bus transfer protocol, e.g. handshake; Synchronisation
CPC
G06F 13/28
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
13Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
14Handling requests for interconnection or transfer
20for access to input/output bus
28using burst mode transfer, e.g. direct memory access ; DMA; , cycle steal
G06F 13/42
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
13Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
38Information transfer, e.g. on bus
42Bus transfer protocol, e.g. handshake; Synchronisation
G06F 13/4243
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
13Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
38Information transfer, e.g. on bus
42Bus transfer protocol, e.g. handshake; Synchronisation
4204on a parallel bus
4234being a memory bus
4243with synchronous protocol
G06F 13/4291
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
13Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
38Information transfer, e.g. on bus
42Bus transfer protocol, e.g. handshake; Synchronisation
4282on a serial bus, e.g. I2C bus, SPI bus
4291using a clocked protocol
G06F 2213/28
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
2213Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
28DMA
Applicants
  • QUALCOMM INCORPORATED [US]/[US]
Inventors
  • HALDAR, Kishalay
  • ATTARDE, Chandan Pramod
  • GARHEWAL, Yogesh
Agents
  • TSAI, Terry
Priority Data
16/204,96929.11.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SECURE DIGITAL (SD) DIRECT COMMAND FOR IMPROVING THROUGHPUT WITH A REDUCED MEMORY FOOTPRINT
(FR) COMMANDE DIRECTE NUMÉRIQUE SÉCURISÉE (SD) POUR AMÉLIORER LE DÉBIT AVEC UNE EMPREINTE À MÉMOIRE RÉDUITE
Abstract
(EN)
A method of improving throughput of a secure digital (SD) bus is described. The method includes accessing, during a data transfer over data lines of the SD bus, read metadata over a command (CMD) line of the SD bus between an SD host and an SD client with a first SD direct command. The method also includes reading a read packet over the data lines of the SD bus from the SD client with a second SD direct command. The method further includes storing the read packet in a host buffer allocated according to the read metadata.
(FR)
L'invention concerne un procédé d'amélioration du débit d'un bus numérique sécurisé (SD). Le procédé consiste à accéder, pendant un transfert de données sur des lignes de données du bus SD, à lire des métadonnées sur une ligne de commande (CMD) du bus SD entre un hôte SD et un client SD avec une première commande directe SD. Le procédé comprend également la lecture d'un paquet lu sur les lignes de données du bus SD À partir du client SD avec une seconde commande directe SD. Le procédé consiste en outre à mémoriser le paquet lu dans un tampon hôte attribué en fonction des métadonnées lues.
Also published as
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