ds265188-port-t1-e1-j1-transc Maxim Integrated Products, Inc., ds265188-port-t1-e1-j1-transc Datasheet - Page 72
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ds265188-port-t1-e1-j1-transc
Manufacturer Part Number
ds265188-port-t1-e1-j1-transc
Description
Ds26518 8-port T1/e1/j1 Transceiver
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS265188-PORT-T1-E1-J1-TRANSC.pdf
(313 pages)
- Current page: 72 of 313
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9.9.15 T1 Programmable In-Band Loop Code Generator
The DS26518 can generate and detect a repeating bit pattern from one to eight bits or 16 bits in length. This
function is available only in T1 mode.
Table 9-33. Registers Related to T1 In-Band Loop Code Generator
Transmit Code Definition Register 1
(T1TCD1)
Transmit Code Definition Register 2
(T1TCD2)
Transmit Control Register 3 (TCR3)
Transmit Control Register 4 (TCR4)
Note: The addresses shown above are for Framer 1. Addresses for Framers 2 to 8 can be calculated using the following: Framer n = (Framer 1
address + (n - 1) x 200hex), where n = 2 to 8 for Framers 2 to 8.
To transmit a pattern, the user will load the pattern to be sent into the Transmit Code Definition Registers
and T1TCD2) and select the proper length of the pattern by setting the TC0 and TC1 bits in Transmit Control
Register 4 (TCR4). When generating a 1-, 2-, 4-, 8-, or 16-bit pattern both
the proper code. Generation of a 3-, 5-, 6-, and 7-bit pattern only requires
accomplished, the pattern will be transmitted as long as the TLOOP control bit (TCR3.0) is enabled. Normally
(unless the transmit formatter is programmed to not insert the F-bit position) the framer will overwrite the repeating
pattern once every 193 bits to allow the F-bit position to be sent.
As an example, to transmit the standard “loop-up” code for Channel Service Units (CSUs), which is a repeating
pattern of ...10000100001..., set TCD1 = 80h, TC0 = 0, TC1 = 0, and TCR3.0 = 1.
REGISTER
ADDRESSES
FRAMER 1
1ACh
1ADh
183h
186h
72 of 313
Pattern to be sent for loop code.
Length of the pattern to be sent.
TLOOP bit for control of number of patterns being
sent.
Length of the code being sent.
T1TCD1
DS26518 8-Port T1/E1/J1 Transceiver
T1TCD1
FUNCTION
and
T1TCD2
to be filled. Once this is
must be filled with
(T1TCD1
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