Data Sheet
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HUNAN FN-LINK TECHNOLOGY Manuals
Electronics
WIFI+BT Module K255B-SR
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Table Of Contents
1 Overview
1.1 Introduction
1.2 Features
1.3 General Specification
1.4 Recommended Operating Rating
※1.5 EEPROM Information
2 Wi-Fi RF Specification
2.1 2.4GHz RF Specification
2.2 5GHz RF Specification
3 Bluetooth Specification
3.1 Bluetooth Specification
4 Pin Assignments
4.1 Pin Outline
4.2 Pin Definition
5 Dimensions
5.1 Module Picture
5.2 Marking Description
5.3 Module Physical Dimensions
5.4 Layout Recommendation
6 Host Interface Timing Diagram
6.1 system power on sequence
6.2 SDIO Pin Description
6.3 SDIO Default Mode Timing Diagram
6.4 SDIO High Speed Mode Timing Diagram
6.5 SDIO Bus Timing Specifications in SDR Modes
6.6 SDIO Bus Timing Specifications in DDR50 Mode
7 Reference Design
8 Ordering Information
9 The Key Material List
10 Recommended Reflow Profile
11 Package Information
11.1 Reel
11.2 Carrier Tape Detail
11.3 Packaging Detail
11.4 Moisture sensitivity
K255B-SR
FN-LINK
TECHN
OLOG
Y
L
IMITED
Proprietar
y
&
Confidential
Inform
ation
21
7
Reference
Desi
gn
Note:
The
fun
ction
of
PIN49
a
nd
P
IN50
will
be
u
pdated
in
future
versio
n.
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