zl50212 Zarlink Semiconductor, zl50212 Datasheet - Page 35

• Manufacturer Part Number: zl50212
• Description: 288 Channel Voice Echo Canceller
• Manufacturer: Zarlink Semiconductor

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
DTDT5
Bit 5
Bit 5
ECA: Double-Talk Detection Threshold
ECB: Double-Talk Detection Threshold
ECA: Double-Talk Detection Threshold
ECB: Double-Talk Detection Threshold
ECA: Error Peak Detect Register 2 (EP)
ECB: Error Peak Detect Register 2 (EP)
EP13
Bit 5
Bit 5
EP5
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.
Register 2
Register 2
Register 1
Register 1
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
ZL50212
DTDT0
DTDT8
Bit 0
Bit 0
Bit 0
Bit 0
EP8
EP0
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