User Manual

Red
pine Signals, Inc. Proprietary and confidential Page 13
RS9110
-
N
-
11
-
02
802.11bgn
WLAN
Module
Data Sheet
Version
1.48
Pin No. Pin Name Pin Type Description
ground.
4)
T
MS Input
This is a JTAG input pin, and
recommended to be connected to
ground.
5)
T
DO Output
This is a JTAG output pin, and
recommended to be left open.
6) I
2C_SCL Inout
I
2
C Bus Clock. By default, and
unless firmware is modified, this
line is programmed as an output
and should be left open.
7) I
2C_SDA Inout
I
2
C Bus Data. By default, and
unless firmware is modified, this
line is programmed as an output
and should be left open.
8)
SD
IO_CLK/SPI_CL
K
Input SDIO/SPI interface clock input
9) S
DIO_CMD/SPI_CS
Input
SD
IO 4-bit: Command/Response
SDIO 1-bit: Command
SDIO-SPI: SPI_CS
SPI: SPI_CS
10)
SD
IO_DATA0/MOS
I
Inout
SDIO 4-bit: Data [0]
SDIO 1-bit: Data line
SDIO-SPI: SPI_DIN (MOSI)
SPI: SPI_DIN
11)
SD
IO_DATA1/MIS
O
Inout
SDIO 4-bit: Data [1]/Interrupt
SDIO 1-bit: Interrupt
SDIO-SPI: Reserved
SPI: SPI_DOUT
12)
SD
IO_DATA2/SPI_
INTR
Inout
SDIO 4-bit: Data [2]/Read wait
SDIO 1-bit: Read wait
SDIO-SPI: SPI_DOUT
SPI: SPI_INT
2
13) S
DIO_DATA3 Inout
SDIO 4-bit: Data [3]
SDIO 1-bit: Reserved
SDIO-SPI: SPI_INT
SPI: Reserved
14) R
EF_CLK Input Reference Clock source: 40MHz.
2
S
PI_INT is used to raise an interrupt, level triggered active_high, upon events in
the chip pertaining to SPI host interface.