Specifications

AMBE-3000™ Vocoder Chip Users Manual
Version 2.8, August, 2011
Dat
a and Configuration Packets
1 Byte 2 Bytes
0x49 Number of microseconds delay
Table 90 PKT_DELAYNUS Field Format
PKT_DELAYNUS Response field (2 bytes) this field indicates that the PKT_DELAYNUS packet was received without
error.
PKT_DELAYNUS Response Field - Format
Field Identifier Response Field Data
1 Byte 0 Byte
0x49 No Data Needed
Table 91 PKT_DELAYNUS Response Field
PKT_DELAYNNS field (3 bytes total) This field specifies the amount of delay in nanoseconds prior to processing the next
control field.
PKT_DELAYNNS Field - Format
Field Identifier Control Field Data
1 Byte 2 Bytes
0x4A Number of nanoseconds delay
Table 92 PKT_DELAYNUS Field Format
PKT_DELAYNNS Response field (1 byte) this field indicates that the PKT_DELAYNNS packet was received without error.
PKT_DELAYNNS Response Field - Format
Field Identifier Response Field Data
1 Byte 0 Byte
0x4A No Data Needed
Table 93 PKT_DELAYNNS Response Field
PKT_RTSTHRESH field (5 bytes total) This field can be used to set the number of threshold high and threshold low free
space bytes in the receive buffer.
PKT_RTSTHRESH Field - Format
Control Fields Data
Field Identifier
thresh_hi thresh_lo
1 Byte 2 Bytes 2 Bytes
0x4E
Table 94 PKT_RTSTHRESH Field Format
The Ready-To-Send (RTSn) pin is output by the AMBE-3000™ Vocoder Chip. The output is active low. The signal is used
by the AMBE-3000™ Vocoder Chip to control the flow of packet data to the AMBE-3000™ Vocoder Chip. The AMBE-
3000™ Vocoder Chip has a receive buffer where incoming packets are stored until they have been processed. When RTSn is
low, the AMBE-3000™ Vocoder Chip indicates that it is ready to receive packet data. When RTSn is high, the AMBE-3000™
Vocoder Chip is not ready to receive packet data. The AMBE-3000™ Vocoder Chip sets RTSn high if there are less than
thresh_hi bytes of free space in the receive buffer. The AMBE-3000™ Vocoder Chip sets RTSn low if there are more than
thresh_lo bytes of free space in the receive buffer. By default, after reset thresh_hi is set to 20 and thresh_lo is set to 40. These
(Subject to Change) Page 69
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