Release Notes History
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SWRU271H–October 2010–Revised April 2019
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General Information
• For each project and configuration, new IAR projects are included for use with the CC2541. The only
exception is that any project/configuration that uses the USB interface has not been replicated for the
CC2541, as it does not have an on-chip hardware USB interface.
• Link-layer processing has been optimized to provide for reduced power consumption during connection
events and advertising events.
• SimpleBLEPeripheral and SimpleBLECentral now use the HCI_EXT_ClkDivOnHaltCmd, which reduces
the current level while the CC2540/41 radio is active.
• The bond manager has been updated to allow peripheral devices to properly pair, bond, and resolve
the address of central devices that use the private resolvable address type.
• New command HCI_EXT_SetMaxDtmTxPowerCmd included, which allows the maximum Tx power
level to be set. This is useful when using Direct Test Mode (DTM), in that the Tx power level will be set
to the maximum value set by the HCI_EXT_SetMaxDtmTxPowerCmd command, which may be less
than +4dBm for the CC2540 and less than 0dBm for the CC2541. The function prototype can be found
in hci.h.
Bug Fixes:
• The command HCI_EXT_SetTxPowerCmd is now properly working.
Known Issues:
• Use of the NV memory (to save application data or Bluetooth Low Energy Host bonding information)
during a Bluetooth Low Energy connection may cause an unexpected disconnect. The likelihood of this
happening increases with frequent usage, especially when using short connection intervals. The cause
is related to the NV wear algorithm which at some point may cause an NV page erase which can
disrupt system real-time processing. It is therefore recommended that the NV memory be used
sparingly, or only when a connection is not active.
• Duplicate filtering does not work when scan is used in combination with a connection.
For technical support, visit the Texas Instruments Bluetooth Low Energy E2E Forum:
http://e2e.ti.com/support/low_power_rf/f/538.aspx
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Version 1.1a Aug 10, 2011
Changes and Enhancements:
• The thermometer profile sample application has been updated to support stored measurements. The
TI_BLE_Sample_Applications_Guide has been updated to match these changes.
Known Issues:
• Use of the NV memory (to save application data or Bluetooth Low Energy Host bonding information)
during a Bluetooth Low Energy connection may cause an unexpected disconnect. The likelihood of this
happening increases with frequent usage, especially when using short connection intervals. The cause
is related to the NV wear algorithm which at some point may cause an NV page erase which can
disrupt system real-time processing. It is therefore recommended that the NV memory be used
sparingly, or only when a connection is not active.
• Duplicate filtering does not work when scan is used in combination with a connection.
For technical support, visit the Texas Instruments Bluetooth Low Energy E2E Forum:
http://e2e.ti.com/support/low_power_rf/f/538.aspx
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Version 1.1 July 13, 2011
Notices:
• This version of the Texas Instruments Bluetooth Low Energy stack and software features several
changes, enhancements, and bug fixes from v1.0. Details of these can be found below.
Changes and Enhancements:
• All projects have been migrated from IAR v7.51A to IAR v.7.60. In order to build all projects, be sure to
upgrade and have IAR v7.60. Also, be sure to download and install all of the latest patches from IAR
for full CC2540 support.
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