Brother T77H228 User Manual

T77H228 USB Wi-Fi Module

USER MANUAL

Project Name USB Wi-Fi Module
Revision 00
Foxconn project code T77H228

Content

1. INTRODUCTION..........................................................................................................3

2. WIFI ALLIANCE CONFORMANCE .............................................................................4

3. HARDWARE SPECIFICATION....................................................................................5

4. PRODUCT REQUIREMENTS......................................................................................5

5. INTERFACE OF CONNECTOR...................................................................................6

6. NOTICE........................................................................................................................7

1. Introduction

The T77H228.00 802.11b/g/n module provides wireless modem functionality utilizing direct
sequence spread spectrum and OFDM/CCK technology. This module is based on
Broadcom BCM4319GKUBG P20 solution which is with integrated 2.4GHz IEEE802.11
b/g/n (MAC/baseband/radio), power amplifiers (PA), and power management unit (PMU).

1.1 Scope

The wireless LAN is compliant to IEEE 802.11b and IEEE 802.11g and IEEE 802.11n
standard. The data rate of 802.11b is up to 11Mbps and fallback rates of 5.5, 2, 1Mbps.
The data rate of 802.11g is up to 54Mbps and fallback rates of 48,36,24,18,12,9, 6Mbps.
The data rate of 802.11n is up to 65Mbps and fallback rates of 6.5, 13, 19.5, 26, 39, 52,

58.5, 65Mbps for HT20. And also provide 13.5, 27, 40.5, 54, 81, 108, 121.5, 135Mbps for
HT40.

1.2 Function

• RoHS and Green Compliant.

• 1X1 IEEE802.11b/g/n based on Broadcom 4319 solution.

• USB 2.0 Interface, High and Full Speeds supported.

• Module is powered by the host with a 3.3V +/- 10% supply.

• Two on-board PCB antennas.

• DPDT switch for antenna diversity.

2. WIFI ALLIANCE CONFORMANCE

The Module is certified by the Wi-Fi Alliance. The Module and standard PC driver passes
the Wi-Fi System Interoperability Test Plan including the following:

A. IEEE 802.11-2007 Standard for LAN/MAN

Specific requirements Part 11: Wireless LAN Medium Access Control (MAC) and
Physical Layer (PHY) Specifications

B. IEEE P802.11n-2009 Standard for Information Technology

Telecommunications and information exchange between systems - Local and
metropolitan area networks – Specific requirements - Part 11: Wireless LAN
Medium Access Control (MAC) and Physical Layer (PHY) Specifications
Amendment 5: Enhancements for Higher Throughput

C. Supported security:

• WPATM and WPA2TM (Personal) support for powerful encryption and authentication

• AES and TKIP acceleration hardware for faster data encryption

• Secure Easy setup for simple Wi-Fi setup and WPA2/WPA security configuration

3. Hardware Specification

4. Product Requirements

4.1 Hardware Requirements
Form factor

Host Interface
PCB

Antenna connector

4.2 Hardware Architecture

The T77H228 802.11b/g/n module is based on Broadcom BCM4319 solution which is with
integrated 2.4GHz IEEE802.11 b/g/n (MAC/baseband/radio), power amplifiers (PA), and
power management unit (PMU).This module is powered from the host (3.3V) and
interfaces to the host with USB 2.0 signals and with two on-board antennas for diversity
and one on-board 30 MHz XTAL.

30 mm x30mm module with 6-pin W.T.B connector
USB2.0 interface

4-layer design
RF switch connector

The functional block diagram is shown as below.