SDI Technologies SDIO Card - Manual (Page 12)

©Copyright 2002-2006 SD Card Association
SDIO Card Bluetooth Type-A Simplified Specification Version 1.00
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2. Type-A Specification Overview
2.1 Scope
This document describes the functional specification for the interface between a Host and an SDIO
Card for Bluetooth over the SDIO (Secure Digital I/O) transport. That is, it defines service interfaces
provided by the Bluetooth protocol in the card side, and the transport mechanism for service interface
data over SDIO. Physical, Electrical and Mechanical aspects of the interface are defined in the SDIO
specification and this document refers to 'SDIO Card Specification' for relevant information.
This document covers the specification for the SDIO Card Type-A for Bluetooth. For the specification of
SDIO Card Type-B for Bluetooth, refer to the document 'SDIO Card Type-B Specification for Bluetooth'.
The Bluetooth protocol specification is based on the document 'Specification of the Bluetooth System
Version 1.1' by the Bluetooth Special Interest Group (SIG).
2.2 SDIO Card Type-A for Bluetooth Interface Structure
Figure 5 shows the SDIO Card Type-A for Bluetooth interface structure. The Type-A card provides only
an HCI interface to the Host.
The Type-A interface provides the Host with a transport for the Bluetooth HCI Protocol. It uses SDIO
commands to provide a reliable and an unreliable transfer mode capability.
The Bluetooth Protocol Service Interface has a two-layer architecture. The bottom layer is SDIO and the
top layer is the SDIO Type-A for Bluetooth Transport. The Type-A Transport provides a packet-oriented
transport interface between the upper protocol layers in the Host and lower protocol layers in the Card.
The packet-oriented service keeps packet boundaries in transmitting and receiving data over SDIO. It
provides a protocol-multiplexing capability and can also offer an error free transport via two SDIO
transfer modes (Byte Basis or Block Basis). Figure 6 shows the two-layered aspect of the Type-A
interface.