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STLC5411FN 数据表(PDF) 33 Page - STMicroelectronics |
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STLC5411FN 数据表(HTML) 33 Page - STMicroelectronics |
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33 / 72 page  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 role herebelow: identification request: 1 0 0 Y X X X X XXXX XX XX identification response: 1 0 0 Y C C C C T T D D D D D D with: - C = circuit revision (00000 for rev 2.x) - T = device type (U = 00) - D = device level identifying the manufacturer (001000 for SGS-THOMSON Microelectronics) In particular for 2.X version the identification re- sponse is: 10 0 Y 0000 00001000 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 50k Ω resistor. In- put 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. Table 5: EOC message processing: local actions. NT1-AUTO: (eoc address 000 or 111) Message Code Local action Operate 2B+D loopback 0101 0000 Send ARL code on C/I channel to operate Loopback 2 in SID-GCI. Forces EC output low Operate B1channel Loopback 0101 0001 Performs transparent loopback on B1 channel identical to LB1 command in CR3 Operate B2 channel Loopback 0101 0010 Performs transparent loopback on B2 channel identical to LB2 command in CR3 Request Corrupted CRC 0101 0011 Performs corruption of the transmit CRC identical to CTC command in CR4. Notify of Corrupted CRC 0101 0100 No action taken. Send back to the Network unable to comply message. Return to Normal 1111 1111 All outstanding EOC operations are reset. Hold state 0000 0000 All outstanding EOC operations maintained in their present state Unable to comply 1010 1010 Sent by UID to indicate that the message is not in its menu NT-RR-AUTO: (eoc address 001 or 111) Message Code Local action Operate 2B+D loopback 0101 0000 Send ARL code on C/I channel to operate Loopback 1A in UID configured in LT-RR-AUTO. Forces EC output low. Operate B1channel Loopback 0101 0001 Performs transparent loopback on B1 channel identical to LB1 command in CR3 Operate B2 channel Loopback 0101 0010 Performs transparent loopback on B2 channel identical to LB2 command in CR3 Request Corrupted CRC 0101 0011 Performs corruption of the transmit CRC identical to CTC command in CR4. Notify of Corrupted CRC 0101 0100 No action taken. Send back to the Network unable to comply message. Return to Normal 1111 1111 All outstanding EOC operations are reset. Hold state 0000 0000 All outstanding EOC operations maintained in their present state Unable to comply 1010 1010 Sent by UID to indicate that the message is not in its menu STLC5411 33/72 |
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