The XTB does not include a microcontroller with firmware.

XTBR Version History:

V1.00 - Initial Release 11/13/09

V1.00 - Initial Release included TW523 emulation mode 10/24/06

V1.01 - Added AGC to TW523 emulation mode for noisy environments 11/19/06

V1.10 - Added user programmable mode settings 12/03/06

V1.10E - European 50Hz version 12/22/06

V1.11/E - Added mode option 8 to prevent command ping-pong in multiple repeater environments 01/14/07

V1.12/E - Corrected 3-phase transmission in TW523 emulation mode 02/09/07

V2.00 - Major upgrade based on XTB-IIR firmware - Beta test 01/11/08, release 02/04/08
                  - Mode options are now the same as for the XTB-IIR
                  - Handles X10 Boost & TW523 emulation without a mode change
                  - Includes enhanced error detection & command storm shutdown
                  - Includes ability to repeat sequential bright/dim commands
                  - Asserts digital output pulses before ZCD edges to accommodate Stargate
             Note: This will not be available for the European 50Hz version

V2.01 - Direct digital loopback when collision detection is not enabled (60Hz ONLY)- 03/23/08

V1.00 - Initial Release 9/10/07

V1.01 - Extended X10 Input sample window before monitoring the powerline 10/26/07

V1.02 - Asserts digital output pulses before ZCD edges to accommodate Stargate
             Outputs "P Status OFF" to digital I/O at command storm shutdown
             Diagnostic output is now a data stream rather than just pulses 12/03/07

V1.03 - Option for delayed burst to reduce potential for dimmer flicker - 01/01/08

V1.04 - Direct digital loopback when collision detection is not enabled - 03/23/08

V1.04E - European 50Hz version - 03/23/08

V1.05/E - No portion of extended command is repeated, but all bits are passed to digital I/O - 06/21/08

V1.06/E - "Doublet" extended commands from CM15A & HomeVision are repeated - 02/22/09

V1.10/E - Similar to 1.06, but modified for version 1.3 PCB (not compatible with prior PCBs) - 05/26/09

V1.11/E - Prevent auto-reset from large transient at exactly start of X10 sample window (V1.3 PCB only) - 09/17/09

V1.12/E - Smoother AGC transition between high gain and low gain modes
                Enable repeater function when in delayed transmit mode (V1.3 & V1.31 PCB only) - 02/07/10
                NOTE:  This is a free upgrade to anyone with V1.10 & V1.11 who needs the delayed transmit mode option.

Known issues:

             NONE!

XTBM Version History:

V1.00 - Initial Release 8/28/09

V1.01 - Eliminate possible noise indication due to strong X10 signals - 09/11/09

V1.02 - Adds power-up self test to help kit builders (for kit version) - 09/23/09

V1.03 - Corrects a problem with some units missing a repeater or failing the self-test - 10/11/09
              NOTE:  All units will now include self-test at power-up.

V1.04 - Displays noise voltage even if the XTBM is trying to decode it as a X10 command - 08/11/10
              (Just $3 if you send back your chip, $5 if you want a new chip)
              NOTE:  Hold both plug prongs while unplugging or inserting the chip to prevent static damage.