User`s manual

EAGLE
Multi-Standard Dual-Channel Digital Audio Codec
13
14.- V35 interface. DB25 connector:
It accepts two types of external TA at 64, 128 or 256kbps:
- V35 (V11) interface: Uses unbalanced asynchronous control signals, while the synchronous
clock and data signals are balanced.
- Physical level interface, compatible with X.21 / RS422 protocol levels.
The pin-out diagram and the signals available in the DB-25 provided in the AEQ Eagle are as
follows:
Physical Level Signal Pin
RS 422 Bal Clock (RCX) V+ 13
RS 422 Bal Clock (RCX) V - 14
RS 422 Bal TX V+ 11
RS 422 Bal TX V- 10
RS 422 Bal RX V+ 21
RS 422 Bal RX V- 19
RS232Unbal DTR (Data Terminal Ready) 20
RS232Unbal DCD (Data Carrier Detect) 8
RS232Unbal GND 7
Pins 4 and 5, equivalent to RS232 signals RTS and CTS are internally looped.
The AEQ EAGLE can be configured from real time control software to choose if DCD signal is
going to be used (DCD CONTROLLED) or ignored (PERMANENT). In this case, it would be
necessary to connect only Tx, Rx and Clock signals.
To connect the AEQ Eagle to an external TA, it will be necessary checking the external TA
user’s manual to make sure its pin arrangement corresponds exactly, due to the variety of
connectors that a TA may have.
The pin out showed below is an example and corresponds to ISO-2593 standard in a MRAC-34
connector.
CCITT
DESCRIPTION
DTE
DB25 Terminal Adapter
MRAC-34 connector
DCE
102 SIGNAL GROUND GND 7
→
B GND
103 TRANSMITTED DATA A TXD A 11
→
P TXD A
TRANSMITTED DATA B TXD B 10
→
S TXD B
104 RECEIVED DATA A RXD A 21
→
R RXD A
RECEIVED DATA B RXD B 19
→
T RXD B
115 RX. CLOCK V+ RXC A 13
→
V RXC A
RX. CLOCK V- RXC B 14
→
X RXC B
Some External Terminal Adapters need to be configured. In those cases, check this
parameters:
- 64kbps, 128kbps or 256kbps
- Synchronous
- CD Forced (ON)
- Ignore DTR
CAUTION:
Unplugging the v.35 interface when power is on could damage EAGLE internal circuits.