Evaluation Kit for CMX608/618/638
EV6180/6380
2016 CML Microsystems Plc
13
UM6180/5
The C-BUS signals CSN and IRQN can each be connected to one of three pins on J3. The pin to
which each of them is connected is determined by the jumper tab settings on connectors J14 and
J15 (J14 for CSN, J15 for IRQN). The default setting is to connect CSN to pin 2 and IRQN to pin
10. This corresponds to the pin configuration for interfacing to the PE0003.
J4 is a double row 5-pin header and provides access to the SPI port signals on the CMX6x8. It
also has +3.3V digital supply and ground connections.
J7 is used in conjunction with the SYNCCTRL register (address $04) on the CMX6x8. This
register controls Vocoder synchronisation with the controlling host. J7 can be used to pull up or
pull down the SYNC pin on the CMX6x8 and to access the internal synchronisation signal.
Additionally, an external synchronisation signal can be applied to the SYNC pin of the CMX6x8 via
this connector.
The voice CODEC input and output pins on the CMX6x8 are directly accessible via connector J5.
Alternative access to the voice CODEC I/O is through connectors J8 and J10, which are stereo,
3.5mm jack sockets. Signals applied to the board via these sockets can be routed into and out of
the voice CODEC in single ended and differential configurations. The jumper tab settings of J9,
J13 and J16 determine what configuration is used. Table 4 lists some suggested jumper tab
settings for these connectors.
Configuration
Socket
J9 setting
J13 setting
J16 setting
Single ended input
J8
1 – 2 short
3 – 4 short
5 – 6 open
7 – 8 open
9 – 10 open
11 –12 open
13 –1 4 short
15 – 16 open
-
-
Differential input
J8
1 – 2 open
3 – 4 open
5 – 6 short
7 – 8 short
9 – 10 short
11 –12 short
13 –1 4 open
15 – 16 open
-
-
Single ended output
J10
-
1 – 2 open
3 – 4 open
5 – 6 open
1 – 2 short
3 – 4 open
5 – 6 open
Differential output
J10
-
1 – 2 open
3 – 4 short
5 – 6 open
1 – 2 open
3 – 4 open
5 – 6 open
Table 4 – Configuration Options for Voice CODEC I/O
Test points TP1, TP2, TP3 and TP4 are attachment points to the digital and analogue ground
planes. These can be used to ground test and measurement equipment. Test point TP5 connects
to the bias pin of the CMX6x8 and can be used to monitor the state of the bias voltage (1.65V).
J11 is an attachment point for the reg3.3V digital voltage.
