ZL50234GD ETC, ZL50234GD Datasheet - Page 27
ZL50234GD
Manufacturer Part Number
ZL50234GD
Description
8 Channel Voice Echo Canceller
Manufacturer
ETC
Datasheet
1.ZL50234GD.pdf
(41 pages)
Data Sheet
These peak detector registers allow the user to monitor the error signal peak level. The information is in 16-bit
2’s complement linear coded format presented in two 8 bit registers for each echo canceller. The high byte is in
Register 2 and the low byte is in Register 1.
This register allows the user to program the level of Double-Talk Detection Threshold (DTDT). The 16 bit 2’s
complement linear value defaults to 4800
dB. The high byte is in Register 2 and the low byte is in Register 1.
DTDT15
DTDT7
Bit 7
Bit 7
EP15
Bit 7
Bit 7
EP7
Power-up
Power-up
Power-up
Power-up
48
00
N/A
N/A
hex
hex
DTDT14
DTDT6
Bit 6
Bit 6
EP14
Bit 6
Bit 6
EP6
DTDT13
ECA: Double-Talk Detection Threshold Register 2
ECB: Double-Talk Detection Threshold Register 2
ECA: Double-Talk Detection Threshold Register 1
ECB: Double-Talk Detection Threshold Register 1
DTDT5
Bit 5
Bit 5
EP13
Bit 5
Bit 5
EP5
ECA: Error Peak Detect Register 2 (EP)
ECB: Error Peak Detect Register 2 (EP)
ECA: Error Peak Detect Register 1 (EP)
ECB: Error Peak Detect Register 1 (EP)
Functional Description of Register Bits
Functional Description of Register Bits
DTDT12
DTDT4
hex
Bit 4
Bit 4
EP12
= 0.5625 or -5 dB. The maximum value is 7FFF
Bit 4
Bit 4
EP4
Zarlink Semiconductor Inc.
DTDT11
DTDT3
Bit 3
Bit 3
EP11
Bit 3
Bit 3
EP3
DTDT10
DTDT2
EP10
Bit 2
Bit 2
Bit 2
Bit 2
EP2
31
10
30
15
35
14
34
11
DTDT9
DTDT1
Bit 1
Bit 1
EP9
EP1
Bit 1
Bit 1
hex
hex
hex
hex
hex
hex
hex
hex
R/W Address:
R/W Address:
R/W Address:
R/W Address:
R/W Address:
R/W Address:
R/W Address:
R/W Address:
hex
+ Base Address
+ Base Address
+ Base Address
+ Base Address
+ Base Address
+ Base Address
+ Base Address
+ Base Address
= 0.9999 or 0
ZL50234
DTDT8
DTDT0
Bit 0
Bit 0
Bit 0
EP8
Bit 0
EP0
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