AMBE2000 ETC, AMBE2000 Datasheet - Page 11

• Manufacturer Part Number: AMBE2000
• Description: VOCODER CHIP
• Manufacturer: ETC

3.2
Pin Number
77
75
85
84
74
73
72
71
70
86
78
83
82
68
67
69
20
79
80
81
32
42
28
34
38
30
29
37
31
Pin Descriptions
Pin Descriptive Name
CODEC_RX_DATA
CODEC_RX_STRB
CODEC_TX_STRB
CHAN_RX_DATA
CHAN_TX_DATA
CHAN_TX_STRB
CHAN_RX_STRB
CHAN_RX_CLK
CHAN_TX_CLK
ECHOCAN_EN
CHANN_SEL1
CHANN_SEL0
CODEC_SEL1
CODEC_SEL0
BAUD_SEL0
BAUD_SEL1
RATE_SEL4
RATE_SEL3
RATE_SEL2
RATE_SEL1
RATE_SEL0
SLEEP_EN
X2/CLKIN
SOFT_EN
VAD_EN
SLIP_EN
RESETN
EPR
X1
Pin Direction
Confidential Proprietary, Subject to Change
Output
Output
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
I/O
User’s Manual Version 3.0
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Notes
Channel Interface Selection Pins : Use these bits to select the channel interface type
(formatted,unformatted active, passive) according to Table 4-A. See full description in
section 4.2.
Used with CH_SEL1 to select channel operation mode
A/D-D/A Select Pins see Table 6-A to select the interface.
Coding Rate Select Pins : Use these bits to select the voice and FEC rates according to
section 7.2. The coding rates are also selectable using the Control Word interface
described in section 5.2.4.
Voice Activation Detection Enable Pin. Active HIGH. See Section 7.4. VAD can also be
enabled/disabled using the Control Word interface as described in section 5.2.9.
Echo Canceller Enable Pin. Active HIGH. See Section 7.3. The Echo Canceller can also
be enabled/disabled using the Control Word interface as described in section 5.2.9.
Standard Sleep Enable Pin. Active HIGH. See Section 7.6.1.
Slip Control Enable Pin. Active HIGH. See Section 7.7.
Clock Input 1. 16.384 Mhz input. See Section 3.4
Output from internal oscillator for the crystal. If the internal oscillator is not used this pin
should be unconnected.
AMBE-2000 Reset pin. Active LOW. See Section 3.3
Encode Packet Ready: Following a reset, this signal will have a high to low transition to
indicate the first packet is ready. The next packet will be ready approximately 20 msec
later. See Note 1.
Soft decision decoding enable. Enables 4 bit soft decision error decoder.
Baud Rate Selector for unformatted serial mode See Table TBDL
Channel Receive Data to AMBE-2000
Channel Transmit Data from AMBE-2000
Channel Receive Clock
Channel Transmit Clock
Channel Transmit Frame Synchronization Pulse
Channel Receive Frame Synchronization Pulse
Frame synchronization pulse for A/D data. Should be connected to CODEC_TX_STRB
Frame synchronization pulse for D/A data. Should be connected to CODEC_RX_STRB
PCM Data from A/D Conveter to AMBE-2000
page 11
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