T7115AMCD LSI, T7115AMCD Datasheet - Page 27

• Manufacturer Part Number: T7115AMCD
• Manufacturer: LSI

Specifications of T7115AMCD

• Package Type: PLCC
• Lead Free Status / Rohs Status: Not Compliant

Data Sheet
April 1997
Lucent Technologies Inc.
Functional Description
In the remote loopback mode:
CLKR must equal or be synchronous with CLKX. We recommend clocking both transmit and receive data with
CLKX (R5—B6 set to 1).
CAUTION: Do not use local and remote loopback modes at the same time. Such use results in an
Receive and transmit bit masks (R12 and R13) should be programmed to the same value.
Transmitted data is retimed. If HWYEN = 0 (R0—B7), the transmitted data is retimed with a maximum delay of
2 bits. If HWYEN = 1 (R0—B7), the received data is transmitted in the first programmed time slot after the
receive time slot is complete.
Received data is retransmitted on the DXA and/or the DXB output, depending on DXAC and DXBC.
The transmitter should be disabled. The receiver can be disabled or, if desired, enabled. Received data is sent
as usual to the receive FIFO if the receiver is enabled.
unknown state in the chip which only a full reset of the chip can clear.
FIFO
FIFO
(continued)
Figure 11. Remote Loopback Mode
TRANSMITTER
RECEIVER
HDLC
HDLC
T7121 HDLC Interface for ISDN (HIFI-64)
CHI
CHI
DXA
DXB
(USER-SELECTED)
DRA
OR
DRB
(USER-SELECTED)
5-5037
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