Bluegiga BLE112: Serial Debugging
In your post, you show (BLE112 on left, FTDI on right of |):

BLE device  | FTDI Serial Adapter

P0_2 | DTR
P0_3 | RX
P0_4 | TX
P0_5 | CTS


However according to Table 3 in the BLE 112 Data Sheet 1.44 off of the Bluegiga website, the pinouts should be:

P0_2 (pin 26) CTS | (FTDI) RTS
P0_3 (pin 25) RTS | (FTDI) CTS
P0_4 (pin 24) TX  | (FTDI) RX
P0_5 (pin 23) RX  | (FTDI) TX


These are for USART 1.  There is a different configuration using the same pins for USART 0, but since the one above is what is used in their development board, this leads me to believe it is the default configuration.

BTW what you refer to as a datasheet is actually a schematic of their breakout board.