32
32
Development Kit
32
Alternatively, 3.3V TTL signals are available through four 6-pin headers, as shown below.
The pinout is compatible with standard FTDI 6-pin SIL connectors. To route a COM port to
the 6-pin header instead of the BD9 connector, a jumper must be placed on J800 (COM1),
J801 (COM2), J804 (COM3) and/or J805 (COM4). Only those COM ports for which the
jumper is placed are routed to the 6-pin header. The other COM ports are still routed to
the DB9 connectors, using the RS232 levels.
6.5
PPS Out and Event Inputs
The PPSout pin of header J500 is connected to the PPSOUT pin of the mosaic-X5 module
through a 1.8V to 3.3V level shifter. The PPS level at the header is 3.3V.
The EVENTA and EVENTB pins of J500 are connected to the EventA and EventB pins of the
mosaic-X5 through a level shifter to 1.8V. The voltage level at the header pins must be
between -0.5V and +6V. These pins are pulled-down by a 100kOhm resistor.
EVENTB
EVENTA
PPSOUT
COM1
COM2
COM3
COM4
G
ND
R
TS (O)
NC
R
X (I)
TX
(O)
C
TS (
I)
