参数资料
型号: 73M1906B-IVT/F
厂商: Maxim Integrated Products
文件页数: 77/88页
文件大小: 0K
描述: MICRODAA SET FXO OF VOIP 20TSSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 74
系列: *
DS_1x66B_001
73M1866B/73M1966B Data Sheet
Rev. 1.6
79
12.1 Loopback Controls
Table 42 describes the registers used for loopback control.
Table 42: Loopback Controls
Function
Mnemonic
Register
Location
Type
Description
TMEN
0x02[7]
W
Test Mode Enable
Used to enable the activation of the test loops controlled by
the DTST bits (DIGLB1 and INTLB1).
0 = Disables DTST loops.
1 = Enables DTST loops.
TMEN has to be set to 1 before the setting of the DTST
bits.
DTST
0x07[1:0]
W
Digital Test Mode Select
These control bits enable DIGLB1 and INTLB1.
Prior to writing to these bits, TMEN must be set to 1.
DTST1
DTST0
Selected Test Mode
0
Normal (Default)
1
0
DIGLB1
1
INTLB1
LB
0x24[0]
W
Loopback
0 = Disables PCM Loopback.
1 = Enables PCM Loopback within the Host-Side Device.
TEST
0x18[7:4]
W
This four-bit field is used to enable the loopback mode per the
following table:
TEST
Loopback Mode
0000 Normal Mode. (Default)
Transmit and receive channels are independent.
0001 Digital Loopback Mode.
DR Transmit Bit Stream (TBS) is looped back to
receive digital channel and received at DX (DIGLB2).
0010 Remote Analog Loopback.
Receive analog signal is converted to Received Bit
Stream (RBS) and is looped back to TBS and the
analog transmit channel (INTLB2).
0011 Analog Loopback.
The transmit DR data is connected to the receiver at
the analog interface and received at the DX pin
(ALB).
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