73M1866B-IMR/F Maxim Integrated Products, 73M1866B-IMR/F Datasheet - Page 79

• Manufacturer Part Number: 73M1866B-IMR/F
• Description: MICRODAA SGL PCM HIGHWAY 42-QFN
• Manufacturer: Maxim Integrated Products
• Series: MicroDAA™r

Specifications of 73M1866B-IMR/F

• Includes: PCM Highway
• Function: Data Access Arrangement (DAA)
• Interface: PCM, Serial, SPI
• Number Of Circuits: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 42-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Power (watts): -

DS_1x66B_001
12.1 Loopback Controls
Table 42 describes the registers used for loopback control.
Rev. 1.6
Function
Mnemonic
TMEN
DTST
LB
TEST
Register
Location
0x02[7]
0x07[1:0]
0x24[0]
0x18[7:4]
Type
W
W
W
W
Table 42: Loopback Controls
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.
Digital Test Mode Select
These control bits enable DIGLB1 and INTLB1.
Loopback
0 = Disables PCM Loopback.
1 = Enables PCM Loopback within the Host-Side Device.
This four-bit field is used to enable the loopback mode per the
following table:
DTST1
0
1
1
TEST
0000 Normal Mode. (Default)
0001 Digital Loopback Mode.
0010 Remote Analog Loopback.
0011 Analog Loopback.
Prior to writing to these bits, TMEN must be set to 1.
TMEN has to be set to 1 before the setting of the DTST
bits.
Transmit and receive channels are independent.
DR Transmit Bit Stream (TBS) is looped back to
receive digital channel and received at DX (DIGLB2).
Receive analog signal is converted to Received Bit
Stream (RBS) and is looped back to TBS and the
analog transmit channel (INTLB2).
The transmit DR data is connected to the receiver at
the analog interface and received at the DX pin
(ALB).
DTST0
0
0
1
Description
Selected Test Mode
Normal (Default)
DIGLB1
INTLB1
Loopback Mode
73M1866B/73M1966B Data Sheet
79