STLC5412 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
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STLC5412 Datasheet PDF : 74 Pages
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STLC5412
Table 5: EOC message processing: local actions.
NT1-AUTO: (eoc address 000 or 111)
Message
Code
Operate 2B+D loopback
0101 0000
Operate B1channel Loopback
0101 0001
Operate B2 channel Loopback
0101 0010
Request Corrupted CRC
0101 0011
Notify of Corrupted CRC
Return to Normal
Hold state
Unable to comply
0101 0100
1111 1111
0000 0000
1010 1010
Local action
Send ARL code on C/I channel to operate Loopback 2 in SID-GCI.
Forces EC output low
Performs transparent loopback on B1 channel identical to LB1
command in CR3
Performs transparent loopback on B2 channel identical to LB2
command in CR3
Performs corruption of the transmit CRC identical to CTC
command in CR4.
No action taken. Send back to the Network unable to comply message.
All outstanding EOC operations are reset.
All outstanding EOC operations maintained in their present state
Sent by UID to indicate that the message is not in its menu
NT-RR-AUTO: (eoc address 001 or 111)
Message
Code
Operate 2B+D loopback
0101 0000
Operate B1channel Loopback
0101 0001
Operate B2 channel Loopback
0101 0010
Request Corrupted CRC
0101 0011
Notify of Corrupted CRC
Return to Normal
Hold state
Unable to comply
0101 0100
1111 1111
0000 0000
1010 1010
Local action
Send ARL code on C/I channel to operate Loopback 1A in UID
configured in LT-RR-AUTO. Forces EC output low.
Performs transparent loopback on B1 channel identical to LB1
command in CR3
Performs transparent loopback on B2 channel identical to LB2
command in CR3
Performs corruption of the transmit CRC identical to CTC
command in CR4.
No action taken. Send back to the Network unable to comply message.
All outstanding EOC operations are reset.
All outstanding EOC operations maintained in their present state
Sent by UID to indicate that the message is not in its menu
IDENTIFICATION CODE (GCI)
The identification register is implemented at the
two addresses 80 H and 90 H. All accesses at ad-
dresses 8x H will generate a read back interrupt
containing the addresses 80 H. Accesses at 9x H
performs exactly the same thing that the 8X regis-
ter except the interrupt will be at address 90 H.
Response will be according to the rule herebelow:
identification request: 1 0 0 Y X X X X X X X X X X X X
identification response: 1 0 0 Y C C C C T T D D D D D D
with: - C = circuit revision
- T = devi ce t ype (U = 00)
- D = device level identifying the manufacturer (001000 for
SGS-THOMSON Microelectronics)
-Y = don’t care
In particular for 1.0 version the identification re-
sponse is:
100Y0000 00001000
For 1.1 version the identification response is:
100Y0101 00001000
34/74
GENERAL PURPOSE I/Os (GCI)
When GCI non-auto mode is selected, (NT or LT),
four programmable I/Os (IO1, IO2, IO3, IO4) are
provided and associated with CR5 register. Each
I/O is internalIy pulled-up with a 250kΩ resistor.
Input or output can be selected for each pin inde-
pendently from the others by means of bits IO1,
IO2, IO3, IO4 in CR5. D1, D2, D3, D4 bits give
the logical value of the I/O pins respectively.
When a status change occurs on one of the input
pins, CR5 is sent on the monitor channel of the
GCI interface.
When GCI auto-mode is selected, two inputs
(ES1, ES2) and one output (EC) are provided in
NT1-AUTO and NT-RRAUTO configurations only.
ES1 and ES2 inputs drive the logical values of
ps1 and ps2 bits in the M4 channel on the line
while EC ouput normally high is driven low using
the eoc message ”operate 2B+D loopback. This
intends to provide power supply testing command
occuring simultaneously with the loopback com-
mand.
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