參數(shù)資料
型號(hào): PEF2426
英文描述: Analog IC
中文描述: 模擬IC
文件頁(yè)數(shù): 63/73頁(yè)
文件大?。?/td> 1618K
代理商: PEF2426
PEB 2466
PEF 2466
Test Modes
Hardware Reference Manual
54
2001-02-20
9.2
Digital Loops
The digital loops feed signals from the receive path back to the transmit path. There are
five digital loops, which are shown in
Figure 34
.
Figure 34
Digital Loops
Table 35
Digital Loop Programming in Register CR3, Bits 7 to 4
Test-Loops Digital Loops (CR3.7 = 1)
1000
DLB-ANA
1001
DLB-4M
1100
DLB-128K
1101
DLB-64K
1111
DLB-PCM
Digital Loop Back via analog port is selected.
Digital Loop Back via 4 MHz is selected.
Digital Loop Back via 128 kHz is selected.
Digital Loop Back via 64 kHz is selected.
Digital Loop Back via PCM Registers is selected.
Receive Path
Transmit Path
Analog
Output
Analog
Input
PCM
Input
PCM
Output
IM1
TH
Digital Gain 2
Digital Gain 2
D
D
D
D
IM2
D
Frequency
Response
Digital Gain 1
Frequency
Response
Digital Gain 1
HPX
HPR
ADC
DAC
AGX
AGR
CMP
EXP
2466_234
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