DEC-200™ H.264 and MPEG-2 Decoder
User Guide V2.7
27
The GPIO D-Sub Connector of the breakout cable ‘P’ has the following pin assignment.
Pin: GPIO Assignment:
1
NC
2
NC
3
NC
4
3.3V
5
GND
6
NC
7
GPO
8
GPI
9
NC
Table 12: Assignment of the GPIO Sub-D Connector of the Breakout Cable 'P'
.!.
GPIO are TTL compatible. Furthermore the GPO output can tide maximum 24 mA.
Maximum current is 24 mA. The GPIO is temporary short-circuit-proof.
.!.
The GPIO of the DEC-200 has TTL logic.
.!.
IMPORTANT INFORMATION about a DEC-200 board modification:
All DEC-200 boards, which have a yellow and green sticker at the
boards, are modified and have the following characteristics: The
3.3V output has no series resistor inside, but the 3.3V output has a
safety fuse. The non-operating state of GPI is 1. To change the GPI value to 0, you must
set GPI to GND. A series resistor is not needed at the DEC-200. The non-operating state
of GPO is 0 (= 0V, TTL = low). If GPO is 1 (TTL = high), the GPO has an output voltage of
5V.
.!.
IMPORTANT INFORMATION about DEC-200 boards:
All DEC-200 boards, which have not a yellow and green sticker at the boards, are not
modified and have the following characteristics: The 3.3V output has a series resistor (1
kΩ) inside. The non-operating state of GPI is 0. To change the
GPI value to 1, you
must feed the GPI with 5V. A series resistor is not needed at the DEC-200. The non-
operating state of GPO is 0 (= 0V, TTL = low). If GPO is 1 (TTL = high), the GPO has an
output voltage of 5V.
.!.
For an error-free GPIO operation in passthrough mode, both, the GPI source and the
GPO destination must be configured correctly. That means, the source and the
destination must be set to the identical passthrough mode, the correct IP-address of
the GPO destination must be entered in the source and the correct IP-address of the
GPI source must be entered in the destination. Furthermore, as long as the GPIO mode
is set to ‘Manual’ the GPI is blocked.
NC = Not Connected