MSD45N

Datasheet

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http://ews-support.lairdtech.com

www.lairdtech.com/wireless

13

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Pin #

Name

I/O

Default

State

Ref.

Description

If Unused

55

SDIO_CMD

I/O

Pull-H

VDD_IO

SDIO Command

56

SDIO_CLK

I

Hi-Z

VDD_IO

SDIO Clock (25 MHz max)

57

SDIO_DATA_0

I/O

Pull-H

VDD_IO

SDIO Data 0

58

SDIO_DATA_3

I/O

Pull-H

VDD_IO

SDIO Data 3

59

SDIO_DATA_1

I/O

Pull-H

VDD_IO

SDIO Data 1

60

GND

-

Ground

Must be

connected to

GND

Note 1:

If the following lines are available on the radio you are integrating into your system, you must connect

and control them with the host device.

CHIP_PWD_L

SYS_RST_L

BT_RST_L

VDDIO_DR

If the radio stays powered up and the host goes down or is reset, communications cannot be re-

established with the radio. The host SDIO controller must re-establish communication with the radio

by reloading the radio firmware after a power-on or a reset.

Note Regarding CHIP_PWD_L: During power on/down period, the CHIP_PWD_L must be held in low state longer

Figure 3: Power on/down timing

Figure 4: Reset timing