AK2540 Datasheet, PDF (28/33 Pages) Asahi Kasei Microsystems – Quad T1 Transceiver

ASAHI KASEI
Normal Operation: Transmit all mark
(RESET=0, AIS=1,AIS1SEL=1, MCLK:clocked, PD=0, LLOOP=RLOOP=0)
POL RDEN TCLK
Receive
signal
TTIP
TRING
RCLK
RPOS
RNEG
LOS
DFM
1
*
clocked
clocked All Mark RCLK
RTIP
0
active
RRING
1
0
clocked
loss
All Mark
0
0
1
active
1
*
loss
clocked All Mark RCLK
RTIP
0
active
(Note2)
RRING
1
0
loss
loss
All Mark
0
0
1
active
(Note2)
1
1
clocked
loss
All Mark RCLK
RTIP
1
active
RRING
1
1
loss
loss
All Mark RCLK
RTIP
1
(Note2)
RRING
active
0
*
clocked
clocked All Mark RCLK
RTIP
0
active
RRING
0
0
clocked
loss
All Mark
0
1
1
active
0
*
loss
clocked All Mark RCLK
RTIP
0
active
(Note2)
RRING
0
0
loss
loss
All Mark
0
1
1
active
(Note2)
0
1
clocked
loss
All Mark RCLK
RTIP
1
active
RRING
0
1
loss
loss
All Mark RCLK
RTIP
1
active
(Note2)
RRING
Remote Loopback
(RESET=0, AIS=0, MCLK:clocked, PD=0, LLOOP=0, RLOOP=1)
POL RDEN TCLK
Receive
signal
TTIP
TRING
RCLK
RPOS
RNEG
LOS
1
*
*
clocked
RTIP
RCLK
RTIP
0
RRING
RRING
1
0
*
loss
RTIP
0
RRING
0
1
1
1
*
loss
RTIP
RCLK
RTIP
1
RRING
RRING
0
*
*
clocked
RTIP
RCLK
RTIP
0
RRING
RRING
0
0
*
loss
RTIP
0
RRING
1
1
0
1
*
loss
RTIP
RCLK
RTIP
1
RRING
RRING
DFM
active
active
active
active
active
active
[AK2540]
MS0012-E-00
28
2000/1