XRT73LC00A_08 Datasheet, PDF (54/63 Pages) Exar Corporation – E3/DS3/STS-1 LINE INTERFACE UNIT

REV. 1.0.1
XRT73LC00A
E3/DS3/STS-1 LINE INTERFACE UNIT
When the XRT73LC00A is operating in the Hardware Mode:
Configure the device to transmit an all “1’s” pattern by toggling the TAOS input pin (pin 2) “High”. Terminate the
all “1’s” pattern by toggling the TAOS input pin “Low”.
When the XRT73LC00A is operating in the HOST Mode:
If the XRT73LC00A is operating in the HOST Mode, the TAOS input pin is disabled. Consequently, the
XRT73LC00A can be configured to transmit an all “1’s” pattern by writing to Command Register CR1 and
setting the TAOS bit-field (bit D3) to “1”.
COMMAND REGISTER CR1 (ADDRESS = 0X01)
D4
D3
D2
D1
D0
TXOFF TAOS TXCLKINV TXLEV TXBIN
0
1
X
X
X
The all “1’s” pattern can be terminated by writing to Command Register CR1 and setting the TAOS bit-field
(D3) to “0".
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