Secure Digital Io (Sdio) Interface - Sierra Wireless AirPrime BX3100 Hardware Integration Manual

Rev 3 Sep.18
Table 4-10: SPI Pin Descriptions
SPI Master
Pin 6-Wire Signal Name
45 HSPID
46 HSPIWP
47 HSPIHD
a. Leave open any pins that are not used.
b. Signal direction with respect to the module.

4.9 Secure Digital IO (SDIO) Interface

Note: Interface support is forthcoming.
The AirPrime BX310x defines one SDIO slave-controller interface (SD 2.0-compliant),
which supports connections to SD memory and I/O cards.
The following features are supported:
• SPI/1-bit/4-bit modes
• Data transfer rates—0–50 MHz
• Block size—Up to 512 bytes
• Interrupts—Module-initiated and host-initiated
• Module-initiated data transfer via host interrupt
• Configurable features—Sampling, driving clock edge
• Registers for direct access by host
Table 4-11 describes the signals used for SDIO.
Note: The pins carrying the SDIO interface are multi-function. The alternate interfaces (GPIO
or SPI) can be selected via an AT command.
Table 4-11: SDIO Pin Descriptions
Pin Signal Name
42 SD_CMD
43 SD_DATA2
44 SD_CLK
45 SD_DATA3
46 SD_DATA0
47 SD_DATA1
a. Leave open any pins that are not used.
a
(Continued)
SPI Slave
5-Wire Signal Name
MOSI
-
SRDY
a
Direction Function
I/O SDIO command
I/O SDIO data bit 2
O SDIO clock
I/O SDIO data bit 3
I/O SDIO data bit 0
I/O SDIO data bit 1
21
Interfaces Specification
b
Direction
Master Slave Function
O I MOSI
O - Write Protect (M)
O O Hold
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