Removable Storage Interface; Overview - Analog Devices ADSP-BF506F Hardware Reference Manual

21 REMOVABLE STORAGE
INTERFACE
This chapter describes the ADSP-BF50x Blackfin processor Removable
Storage Interface (RSI) and includes the following sections:
•

"Overview"

• "Interface Overview" on page 21-2
• "Description of Operation" on page 21-6
• "Functional Description" on page 21-9
• "Programming Model" on page 21-32
• "RSI Registers" on page 21-52
Overview
ADSP-BF50x Blackfin processors provide an RSI interface for multimedia
cards (MMC), secure digital memory cards (SD), secure digital input/out-
put cards (SDIO) and consumer electronic ATA devices (CE-ATA). All of
these storage solutions use similar interface protocols. The main difference
between MMC and SD support is the initialization sequence. The main
difference between SD and SDIO support is the use of interrupt and read
wait signals for SDIO. CE-ATA devices require handling of larger block
sizes of 4K bytes and implement a device interrupt scheme known as the
command completion signal (CCS).
ADSP-BF50x Blackfin Processor Hardware Reference 21-1