User's Manual

Bluegiga Technologies Oy
Page 10 of 41
SDIO/CSPI
Interfaces
PIN
NUMBER
PAD TYPE
DESCRIPTION
SDIO_DATA[0]
2
Bi-directional, tri-
state, weak
internal pull-up
Synchronous data input/output
SDIO_SPI_DI
SDIO SPI data output
CSPI_MISO
CSPI data output
SDIO_DATA[1]
3
Synchronous data input/output
SDIO_SPI_INT
SDIO SPI interrupt output
CSPI_INT
CSPI data input
SDIO_DATA[2]
4
Synchronous data input/output
SDIO_DATA[3]
5
Bi-directional,
weak/strong
internal pull-up
Synchronous data input/output
SDIO_SPI_CS#
SDIO SPI chip select, active low
CSPI_CS#
CSPI chip select, active low
SDIO_CLK
6
Input, weak
internal pull-up
SDIO clock
SDIO_SPI_SCLK
SDIO SPI clock
CSPI_CLK
CSPI clock
SDIO_CMD
7
Bi-directional,
weak internal
pull-up
SDIO data input
SDIO_SPI_MOSI
SDIO SPI data input
CSPI_MOSI
CSPI data input
Table 3: Host Interface Terminal Descriptions