== Frequency Extension Board (!FreeBo) ==

=== !FreeBo Registers ===

{{{
#!rst

+-----------------------+------------+----------+------+------+---------------------------------------------+
|Name	                | Address    | # of Reg | Bits | Description                                        |
+=======================+============+==========+======+====================================================+
| ADF4350 VCO           | 200 to 223 |    24    |  8   | The original 6 x 32-bit LO registers are mapped    |
|                       |            |          |      | to 8 bit buss with the following mapping:          |
|                       |            |          |      | R0: 200 -203, R1: 204 -207, R2: 208-211,           |
|                       |            |          |      | R3: 212 -215, R4: 216 -219, R5: 220-223            | 
+-----------------------+------------+----------+------+----------------------------------------------------+
| MAX7301 RF Switch     | 224 to 247 |    24    |  8   | 12 x 16-bit registers are mapped to 24 8-bit regs  |
|                       |            |          |      | R0: 224-225,R1: 226-227,R2: 228-229,               |
|                       |            |          |      | R3: 230-231, R4: 232-233,R5: 234-235,              | 
|                       |            |          |      | R6: 236-237, R7: 238-239,R8: 240-241,              | 
|                       |            |          |      | R9: 242-243, R10: 244-245, R11: 246-247            | 
+-----------------------+------------+----------+------|----------------------------------------------------+
|Hittit HMC629          |     1      |     1    |  8   |The upper 4 bits program the RX attenuator while the|
|RF Attenuator          |            |          |      |the lower 4 bits control the TX attenuator.         |
+-----------------------+------------+----------+------|----------------------------------------------------+
}}}