AK2540 Datasheet, PDF (30/33 Pages) Asahi Kasei Microsystems – Quad T1 Transceiver

ASAHI KASEI
Local Loopback: Transmit all space
(RESET=0, AIS=1, AIS1SEL=0, MCLK:clocked, PD=0, LLOOP=1, RLOOP=0)
POL RDEN TCLK
Receive
signal
TTIP
TRING
RCLK
RPOS
RNEG
LOS
DFM
1
*
clocked
clocked
0
TCLK
TPOS
0
0
(Note4) TNEG
1
*
clocked
loss
0
TCLK
TPOS
1
0
(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
0
TCLK
TPOS
0
0
(Note4) TNEG
0
*
clocked
loss
0
TCLK
TPOS
1
0
(Note4) TNEG
0
*
loss
clocked
0
0/1
1
0
0
(Note3)
0
*
loss
loss
0
0/1
1
1
0
(Note3)
Local Loopback: Transmit all mark
(RESET=0, AIS=1, AIS1SEL=1, MCLK:clocked, PD=0, LLOOP=1, RLOOP=0)
POL RDEN TCLK
Receive
signal
TTIP
TRING
RCLK
RPOS
RNEG
LOS
DFM
1
*
clocked
clocked All Mark TCLK
TPOS
0
active
(Note4) TNEG
1
*
clocked
loss
All Mark TCLK
TPOS
1
active
(Note4) TNEG
1
*
loss
clocked All Mark
0/1
0
(Note2) (Note3)
0
active
1
*
loss
loss
All Mark
0/1
0
(Note2) (Note3)
1
active
0
*
clocked
clocked All Mark TCLK
TPOS
0
active
(Note4) TNEG
0
*
clocked
loss
All Mark TCLK
TPOS
1
active
(Note4) TNEG
0
*
loss
clocked All Mark
0/1
1
(Note2) (Note3)
0
active
0
*
loss
loss
All Mark
0/1
1
(Note2) (Note3)
1
active
Note1) The impedance between TTIP and TRING is 30kohm(typ)
Note2) Transmit signal synchronize with MCLK
Note3) When CLKE is “1”, RCLK is fixed to “1”.
Note4) The phase of the TCLK satisfy receive output timing.
[AK2540]
MS0012-E-00
30
2000/1