AK2540 Datasheet, PDF (29/33 Pages) Asahi Kasei Microsystems – Quad T1 Transceiver

ASAHI KASEI
Remote Loopback: Transmit all space
(RESET=0, AIS=1, AIS1SEL=0, MCLK:clocked, PD=0, LLOOP=0, RLOOP=1)
POL RDEN TCLK
Receive
signal
TTIP
TRING
RCLK
RPOS
RNEG
LOS
DFM
1
*
*
clocked
0
RCLK
RTIP
0
0
RRING
1
0
*
loss
0
0
0
1
0
1
1
*
loss
0
RCLK
RTIP
1
0
RRING
0
*
*
clocked
0
RCLK
RTIP
0
0
RRING
0
0
*
loss
0
0
1
1
0
0
1
*
loss
0
RCLK
RTIP
1
0
RRING
Remote Loopback: Transmit all mark
(RESET=0, AIS=1, AIS1SEL=1, MCLK:clocked, PD=0, LLOOP=0, RLOOP=1)
POL RDEN TCLK
Receive
signal
TTIP
TRING
RCLK
RPOS
RNEG
LOS
DFM
1
*
*
clocked All Mark RCLK
RTIP
0
active
RRING
1
0
*
loss
All Mark
0
0
1
active
1
1
0
*
0
0
*
loss
All Mark RCLK
RTIP
1
active
RRING
*
clocked All Mark RCLK
RTIP
0
active
RRING
*
loss
All Mark
0
1
1
active
0
1
*
loss
All Mark RCLK
RTIP
1
RRING
active
Local Loopback(RESET=0, AIS=0, MCLK:clocked, PD=0, LLOOP=1, RLOOP=0)
POL RDEN TCLK
Receive
signal
TTIP
TRING
RCLK
RPOS
RNEG
LOS
DFM
1
*
clocked
clocked
TPOS
TCLK
TPOS
0
active
TNEG (Note4) TNEG
1
*
clocked
loss
TPOS
TCLK
TPOS
1
active
TNEG (Note4) TNEG
1
*
loss
clocked
0
0/1
0
0
0
(Note3)
1
*
loss
loss
0
0/1
0
1
0
(Note3)
0
*
clocked
clocked
TPOS
TCLK
TPOS
0
active
TNEG (Note4) TNEG
0
*
clocked
loss
TPOS
TCLK
TPOS
1
active
TNEG (Note4) TNEG
0
*
loss
clocked
0
0/1
0
0
0
(Note3)
0
*
loss
loss
0
0/1
0
1
0
(Note3)
[AK2540]
MS0012-E-00
29
2000/1