VC-20-PRJ25 IMBE™ Vocoder Board
User’s Manual
Page 5
Section 3 – Technical Specifications
DVSI Confidential Proprietary
VC-20-PRJ25 Connector Signals
Name
Type
Description
VCC
Power
D5v +/- 5%
GND
Power
Digital Ground
+5v
Power
5v +/- 10%
-5v
Power
Analog -5v +/- 10%
GND Anlg
Power
Analog Ground
ITXD
Output
Transmit data I channel
QTXD
Output
Transmit data Q channel
TXCK
Input
Transmit data bit clock (3.6 kHz)
FMEN
Input
Encoder frame flag (Active High)
IRXD
Input
Receive data I channel (MSB)
IRXD1
Input
Receive data I channel
IRXD0
Input
Receive data I channel (LSB)
QRXD
Input
Receive data Q channel (MSB)
QRXD1
Input
Receive data Q channel
QRXD0
Input
Receive data Q channel (LSB)
RXCK
Input
Receive data bit clock (3.6 kHz)
FMDE
Input
Decoder frame flag (Active High)
LOST
Input
Lost speech frame detected flag (Active High)
RESET
Output
Voice codec reset flag (Active High)
STATUS
Output
Voice codec status flag (Active High)
ENSLNCE
Output
Encoder Silence Detected (Active Low) Disabled
DESLNCE
Input
Decoder silence control (Active Low)
VFRO
Output
Analog speech output signal
VRXI
Input
Analog speech input signal
RUN
Output
Run Status Signal (Active High)
RESX
Output
Internal Reset Status (Active Low)
DINRS
Input
Reset Signal (Active High)
HD_SD
Input
Enable Soft-decision Decoding (Active Low)
FEC_OFF
Input
Disable error correction and interleaving (Active Low)
