Revision 0.2 (Confidential) 7 www.national.com
LMX9820ADEV: LMX9820A Simply Blue Module Kit User’s Guide
2.0 Board Components and Pin Assignments
A summary of the configuration and selection jumpers is
provided in the tables that follow. Reference both the sche-
matic and BOM (Bill of Materials) (included on the CD in
the kit) and also available on the Wireless Developer’s web
site.

2.1 TEXAS MOTHERBOARD

•Table 2-1 lists the primary devices on the board.
•Table 2-2 lists the connectors, configuration, and selec-
tion jumpers.
•Table 2-3 lists the switches and LEDs.

Table 2-1. Texas Motherboard Primary Devices

Device # Name
U2 National LP2986 Low-Dropout Voltage Regulator - IOVCC
U4 National LP2986 Low-Dropout Voltage Regulator - UVCC
U5 National LP2986 Low-Dropout Voltage Regulator - VCC
U46 Maxim MAX3245 1 Mbps High Speed UART Driver
U55 Toshiba TC7WH14FU Schmitt Inverter - Used for POR (Power On Reset) circuitry

Table 2-2. Connectors, Configuration, and Selection Jumpers Summary

Jumper # Name Details
P3 DP9 Serial Connector – Male Table 2-4 on page 8
JP1 JTAG Connector (10x2) Table 2-5 on page 8
J1 50-pin Connector to Austin Daughterboard Table 2-23 on page 11
J4 Test Points and General Purpose Outputs Table 2-6 on page 8
J5 USB (not used for LMX9820A) Table 2-7 on page 8
J6 ENV0 Table 2-8 on page 8 and Table 2-10 on page 9
J7 ENV1 Table 2-9 on page 8 and Table 2-10 on page 9
J9/J22 GND GND
J10 LSTAT_0 Internal Use Only
J11 LSTAT_1 Internal Use Only
J12 Audio Codec Header (4x2) Table 2-12 on page 9
J14 USB or DC Power Supply Jumper Table 2-13 on page 9
J15 DC Power Jack Figure 2-2 on page 9
J16 ISEL1 Section 2.1.9 on page 9
J17 ISEL2 Section 2.1.9 on page 9
J23 Audio Codec Optional Test Point - User defined
(not used for LMX9820A)
Table 2-12 on page 9

Table 2-3. Switches and LEDs

Name Description
SW1 Reset# - Reset
D1 LED for LSTAT_0 (not used for LMX9820A)
D2 LED for LSTAT_1 - When illuminated, firmware has loaded properly
D3 LED for VCC
D4 LED for IOVCC
D5 LED for UVCC
D6 LED for TX/RX Activity