DS2156 datasheet(79/265 Pages) MAXIM

Part #	DS2156

Description	T1/E1/J1 Single-Chip Transceiver TDM/UTOPIA II Interface

PDF	265 Pages

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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DS2156

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Bit 3/Local Loopback (LLB). In this loopback, data continues to be transmitted as normal through the transmit

side of the SCT. Data being received at RTIP and RRING are replaced with the data being transmitted. Data in this

loopback passes through the jitter attenuator. See Figure 2-2 for more details.

0 = loopback disabled

1 = loopback enabled

Bit 4/Line Interface Unit Mux Control (LIUC). This is a software version of the LIUC pin. When the LIUC pin

is connected high, the LIUC bit has control. When the LIUC pin is connected low, the framer and LIU are

separated and the LIUC bit has no effect

0 = if LIUC pin connected high, LIU internally connected to framer block and deactivate the

TPOSI/TNEGI/TCLKI/RPOSI/RNEGI/RCLKI pins

1 = if LIUC pin connected high, disconnect LIU from framer block and activate the

TPOSI/TNEGI/TCLKI/RPOSI/RNEGI/RCLKI pins

LIUC Pin

LIUC Bit

Condition

LIU and framer separated

LIU and framer connected

LIU and framer separated

Bits 5 to 7/Unused, must be set to 0 for proper operation

DS2156 Datasheet(PDF) 79 Page - Maxim Integrated Products