LMX9838SBX National Semiconductor, LMX9838SBX Datasheet
LMX9838SBX
Specifications of LMX9838SBX
Available stocks
Related parts for LMX9838SBX
LMX9838SBX Summary of contents
Page 1
... Bluetooth data links and one active SCO link. 3.0 Functional Block Diagram Bluetooth ® registered trademark of Bluetooth SIG, Inc. and is used under license by National Semiconductor Corporation. CompactRISC ® registered trademark of National Semiconductor Corporation. © 2007 National Semiconductor Corporation The on-chip Patch RAM provided for lowest cost and risk, al- lows the flexibility of firmware upgrade ...
Page 2
... Dial Up Networking (DUN) — Facsimile Profile (FAX) — File Transfer Protocol (FTP) 6.0 Ordering Information Order Number LMX9838SB LMX9838SBX Note 1: NOPB = No Pb (No Lead) www.national.com — Object Push Profile (OPP) — Synchronization Profile (SYNC) — Headset (HSP) — Handsfree Profile (HFP) — ...
Page 3
Connection Diagram 8.0 Pad Description Pad Name Pad Location Type OP3 16 I OP4: I OP4/PG4 26 PG4 OP5 25 I/O 32K 32K Pad Name Pad Location Type RXD 12 I TXD 13 ...
Page 4
Pad Name Pad Location SCLK 20 SFS 21 STD 22 SRD 23 Pad Name Pad Location _CORE _IO 11 CC 3,4,17,18,24, GND 29,30,31,32 1,5,33,34,35, NC 36,37,38,39,40 41,42,43,44,45, 46,47,48,49,50, 51,52,53,54,55, NC ...
Page 5
... UART interface to a data device like a sensor. The LMX9838 just waits for an incoming link and forwards data between the data device and the bluetooth link. PG6 acts as active link indicator and is used to enable the data transfer from the sensor. A 32.768khz crystal may be is used to reduce power consumption while waiting for the incoming link ...
Page 6
... The following conditions are true unless otherwise stated in the tables below: • -40°C to +85°C A • 3.3V CC • RF system performance specifications are guaranteed on National Semiconductor FlagStaff board rev 2.1 evaluation platform. Absolute Maximum Ratings Parameter Recommended Operating Conditions Parameter Power Supply Requirements (Notes 11, 12) Parameter 6 Min Max Unit -0 ...
Page 7
... All tests are measured at antenna port unless otherwise specified • -40°C to +85°C A • V _RF = 2.8V unless otherwise specified DD RF system performance specifications are guaranteed on National Semiconductor Flagstaff board rev 2.1 evaluation platform. Symbol Parameter RX Receive Sensitivity sense PinRF Maximum Input Level IMP ...
Page 8
... MHz, CWI BER < 0.001 -27 dBm, -27 in 2498 MHz < F < 3000 MHz, CWI BER < 0.001 -10 dBm, -10 in 3000 MHz < F < 12.75 GHz, CWI BER < 0.001 = -39dbm sine wave -39 dBm Bluetooth modulated signal Typ Max Unit (Note 15) dBm dBm dBm dBm = and | 1MHz ...
Page 9
... Initial Carrier Frequency Drift drift (Note 22 Transmitter Delay Time D Note 22: Frequency accuracy is dependent on crystal oscillator chosen. The crystal must have a cumulative accuracy of < +/-20ppm to meet Bluetooth specifications. Note: All RF parameters are tested prior to the antenna. Transmitter Performance Characteristics Condition 2.402 GHz 2.441 GHz 2 ...
Page 10
... Clear-to-Send signals. RTS and CTS are used for hardware handshaking between the host and the LMX9838. Since the LMX9838 acts as gateway between the bluetooth and the UART interface, National Semiconductor recommends to use the handshaking signals especially for transparent operation. In case two signals are used CTS needs to be pulled to GND. ...
Page 11
OP3 (Note 23) OP4 (Note 24 Note 23: If OP3 is 1, must use 1K pull up Note 24: If OP4 is 1, must use 1K pull up Note 25: If OP5 ...
Page 12
Power Up The LMX9838 contains an internal EEPROM initialized during power up or hardware reset. During this initialization phase it is recommended not to: • Send a command to the LMX9838: The command will be ignored. • Power OFF/ON ...
Page 13
Digital Smart Radio 13.1 FUNCTIONAL DESCRIPTION The integrated Digital Smart Radio utilizes a heterodyne re- ceiver architecture with a low intermediate frequency (2 MHz) such that the intermediate frequency filters can be integrated on chip. The receiver consists of ...
Page 14
TRANSMITTER CIRCUITRY The transmitter consists of ROM tables, two Digital to Analog (DA) converters, two low-pass filters, IQ mixers, and a power amplifier (PA). The ROM tables generate a digital IQ signal based on the transmit data. The output ...
Page 15
... UART which normally are used to configure and control the module. The packages don’t need to be formatted as de- scribed in Table 13. Instead all data are directly passed through the firmware to the active bluetooth link and the re- mote device. Transparent mode can only be supported on a point-to-point connection ...
Page 16
... Default Audio Settings none www.national.com TABLE 11. Operation Parameters Stored in LMX9838 Default Value Bluetooth device address Bluetooth PinCode Automatic mode ON or OFF Up to seven default devices to connect to Service discovery database, control for supported profiles Sets the speed of the physical UART interface to the host ...
Page 17
... UART transport layer and the radio activity are defined: The radio activity level mainly depends on application re- quirements and is defined by standard bluetooth operations like inquiry/page scanning or an active link. A remote device establishing or disconnecting a link may also indirectly change the radio activity level. ...
Page 18
... Byte - - - - - - - - - - - - - Checksum - - - - - - - - - - - - - www.national.com 16.0 Command Interface The LMX9838 offers Bluetooth functionality in either a self contained slave functionality or over a simple command in- terface. The interface is listening on the UART interface. The following sections describe the protocol transported on the UART interface between the LMX9838 and the host in command mode (see Figure 8) ...
Page 19
... All requests are answered by exactly one confirm. The Bluetooth modules confirm to a request. All requests are answered by exactly one confirm. Information sent from the Bluetooth module that is not a direct confirm to a request. Indicating status changes, incoming links, or unrequested events. An optional response to an indication. ...
Page 20
... SPP Port Framing Error SPP Port Framing Error Confirm SPP Port Status Changed www.national.com TABLE 19. Bluetooth Low Power Modes Event Defines the link policy used for any incoming or outgoing link Returns the stored default link policy Defines the modes allowed for a specific link ...
Page 21
... Set specific UART speed; needs proper ISEL pin setting Change configuration for parity and stop bits Enable Bluetooth, EMI test, or local loopback Soft reset Stops the bluetooth firmware and executes the In-system- programming code Write Clock Frequency setting in the NVS Read Clock Frequency setting from the NVS ...
Page 22
... Write NVS Write NVS Confirm Command Set Clock and Baudrate Set Clock and Baudrate Confirm Enter Bluetooth Mode Enter Bluetooth Mode Confirm Set Clock and Baudrate Set Clock and Baudrate Confirm Command Set GPIO WPU Set GPIO WPU Confirm Get GPIO Input State ...
Page 23
Application Notes The different possibilities to power supply the LMX9838 de- pend on the IO interface logic level. Figure 9 represents an example of system functional schematic for the LMX9838 using a 3.0V to 3.3V IO interface. Figure 10 ...
Page 24
Capacitor values C1 and C2 may vary depending on design and crystal manufacturer specification. MVCC can be connected to 3.0V and above in this configuration. Please see Recommended Operating Conditions. FIGURE 10. 2.5V to 3.0V Example Functional System Schematic Capacitor ...
Page 25
Capacitor values C1 and C2 may vary depending on design and crystal manufacturer specification. MVCC can be connected to 3.0V and above in this configuration. Please see Recommended Operating Conditions. FIGURE 12. 1.8V Example Functional System Schematic Notes: 25 30027911 ...
Page 26
Evaluation Design www.national.com 26 ...
Page 27
Soldering The LMX9838 bumps are designed to melt as part of the Sur- face Mount Assembly (SMA) process. In order to ensure reflow of all solder bumps and maximum solder joint reliability while minimizing damage to the package, recommended ...
Page 28
Regulatory Compliance The LMX9838 has been tested and approved to be compliant to the following regulatory standards: CE Compliance: • EN 300 328 v1.7.1 • EN 301 489-17 v1.2.1 IC Compliance: • RSS-GEN Issue 1 • RSS-210 Issue 7 ...
Page 29
Physical Dimensions inches (millimeters) unless otherwise noted NS Package Number SB70A 29 www.national.com ...
Page 30
... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...