參數(shù)資料
型號(hào)： IDT821034
廠商： Integrated Device Technology, Inc.
元件分類： Codec
英文描述： QUAD PCM CODEC WITH PROGRAMMABLE GAIN
中文描述： 四的PCM編解碼器，具有可編程增益
文件頁數(shù)： 14/52頁
文件大?。?/td> 609K
代理商： IDT821034
14
INDUSTRIAL TEMPERATURE RANGES
IDT82V2058 OCTAL E1 SHORT HAUL LINE INTERFACE UNIT
TABLE - 5. AIS CONDITION
TABLE - 4. LOS CONDITION IN CLOCK RECOVERY MODE
TABLE - 3. CONFIGURATION OF THE LINE CODE RULE
Loss of Signal (LOS) Detection
The Loss of Signal Detector monitors the amplitude and density of
the received signal on Receiver line before the transformer
(measured on port A, B in Figure 12). The loss condition is reported
by pulling pin LOSn to high. In the same time, LOS alarm registers
track LOS condition. When LOS detected or cleared, an interrupt will
generate if not masked. In host mode, the detection supports the ITU-
G.775 and ETSI 300233. In hardware mode, it only supports the ITU-
G.775 specification.
Table-4
summarizes the conditions of LOS in clock recovery
mode.
In data recovery mode, the LOS condition is cleared upon
detecting the signal level exceeds 540mV.
During LOS, the RDPn/RDNn output the sliced data when bit
AISE(Alam Indication Signal Enable) in register
GCF
is 0 or output all
ones as AIS (Alarm Indication Signal) when bit AISE is set to 1; The
RCLKn is replaced by MCLK only if the AISE is set.
Alarm Indication Signal Detection (AIS)
Alarm Indication Signal is available only in host mode with clock
recovery, as
Table-5
shows.
Error Detection
The device can detects excessive zero, bipolar violations and
HDB3 code violations, refer to
figure-7, 8, 9
. All the three kinds of er-
rors are reported in both host mode and hardware mode with HDB3
line code rule is used. Moreover, in host mode, the expanded regis-
ters
e-CZER
and
e-CODV
are used to determine whether the exces-
TABLE - 6. ERROR DETECTION
STANDARD Signal on
G.775 for E1
ETSI 300233 for E1 pin LOSn
32
below typ. 310mV (Vpp)
below typ. 310mV (Vpp)
12.5% (4 marks in a sliding 32-bit period)
12.5% (4 marks in a sliding 32-bit period)
with no more that 15 continuous zeros
with no more than 15 continuous zeros
exceed typ. 540mV (Vpp)
LOS
Detected
LOS
Cleared
Continuous Intervals
Amplitude
2048 (1 ms)
H
Density
L
Amplitude
exceed typ. 540mV (Vpp)
ITU G.755 for E1 (register LAC defaulted to 0)
Less than 3 zeros contained in each of two consecutive
512-bit stream are received
3 or more zeros contained in each of two consecutive
512-bit stream are received
ETSI 300233 for E1 (register LAC is 1)
Less than 3 zeros contained in a 512-bit stream
are received
3 or more zeros contained in a 512-bit stream
are received
AIS Detected
AIS Cleared
Hardware Mode
Line Code
AMI
Host Mode
Pin CVn Reports
Bipolar Violation
Bipolar Violation
+ Code Violation
+ Excessive Zero
Line Code CODVn in
e-CODV
CZERn in
e-CZER
AMI
-
0
0
1
1
Pin CVn Reports
Bipolar Violation
Bipolar Violation + Code Violation
Bipolar Violation + Code Violation + Excessive Zero
Bipolar Violation
Bipolar Violation + Excessive Zero
-
0
1
0
1
HDB3
HDB3
Host Mode
CODE in
GCF
CODEn in
e-CODE
SINGn in
e-SINGn
0
0 / 1
0
0
1
0 / 1
1
1
0
1
1
0
Line Code Rule
0
1
0
1
1
1
All channels in HDB3
All channels in AMI
CHn in AMI
CHn in HDB3
Hardware Mode
CODE
Line Code Rule
L
All channels in HDB3
H
All channels in AMI
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IDT821034DN 功能描述:IC PCM CODEC QUAD MPI 52-PQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動(dòng)態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
IDT821034DNG 功能描述:IC PCM CODEC QUAD MPI 52-PQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動(dòng)態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
IDT821054 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
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