EV6120 Datasheet, PDF (20/28 Pages) CML Microcircuits – For CMX612 Product Evaluation

Evaluation Kit for CMX612
EV6120
1.6.3
Firmware
This section describes the operation of the EV6120 kit using the LCD module and the demonstration
selection switches SW1 and SW2. It also describes the sequence of events followed by the available
demonstrations.
1.6.3.1
Start-up
As described in Quick start section.
The opening messages will be EF6120 Vx.x (where x.x represents the version number), plus a menu
from which demonstrations may be selected using SW1 (>>) and SW2 (SELect).
SW1 (>>) will scroll along the menu items and SW2 (SELect) will select the currently highlighted menu item.
When the cursor is above SW1 (>>) the EV6120 is idle. When the cursor is above SW2 (SELect) the
currently displayed demonstration is active. Use SW2 (SELect) to exit the active demonstration.
When a new selection has been made the start up messages will be displayed on the LCD until a new CLI
message has been received.
Note that the type2 CIDCW option has a sub-menu for feature phone or adjunct box mode.
1.6.3.2
BT type 1 demonstration
This demonstration covers the BT on-hook service initiated by a line reversal followed by an alert
tone, see flowchart in CMX612 datasheet (application notes section). CLI message parameters are
displayed on the LCD.
On the EV6120 board, FET TR8 is switched on to provide wetting current for 15ms during the silent
period between the alert tone and the FSK data. A resistor can be fitted in the R7 position if a current
wetting pulse is required.
FET TR9 is switched on during the FSK receive period. If an ac termination is required, components
can be fitted in positions R4, R6 and C3.
1.6.3.3
Bellcore type 1 demonstration
This demonstration covers the Bellcore and ETSI on-hook services associated with ringing, see
flowchart in CMX612 datasheet (application notes section). Any ringing of duration < 500ms is
assumed to be a line reversal and is ignored. CLI message parameters are displayed on the LCD.
FET TR9 is energised during the FSK receive period. If an ac termination is required, components
can be fitted in positions R4, R6 and C3.
1.6.3.4
FSK only type1 demonstration.
This demonstration covers the Bellcore on-hook service not associated with ringing. The CMX612
remains in rx mode continuously monitoring for FSK signals. Parameters are displayed as with other
modes.
© 2000 Consumer Microcircuits Limited
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UM6120/1