QT2032-EKG-1A2 Applied Micro Circuits Corporation, QT2032-EKG-1A2 Datasheet - Page 44

• Manufacturer Part Number: QT2032-EKG-1A2
• Manufacturer: Applied Micro Circuits Corporation

Specifications of QT2032-EKG-1A2

• Lead Free Status / RoHS Status: Supplier Unconfirmed

QT2022/32 - Data Sheet: DS3051
The operations allowed by the pointer are listed below. Corresponding event flags are asserted high in Register
2.C000h:
Note: In the case where the pointer signaling indicates both positive and negative stuff operations, the logic considers this an invalid
The following list summarizes the rules for interpreting the pointer:
The QT2032 receive pointer processor can react to any change in the pointer value, for example, the receiver can
react to frame after frame of positive stuff, negative stuff.
Here are the cases where the pointer is considered as invalid:
The QT2032 receive pointer processor checks the concatenation indicator in the H1H2 fields (after the first H1H2
bytes). A value of ‘93FF’ is expected. Any other value will cause a LOP-P condition. The SS bits must have a value
of ‘00’. In an SDH network, non-zero SS bits are allowed in the concatenation indicator. If non-zero values are used
in the concatenation indicator an LOP-P defect will be triggered.
If the pointer is invalid the bit 1 of register 2.32768 with be set to 1.
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1. positive stuff requires:
2. negative stuff requires:
3. pointer jump: there are 2 cases where the pointer can jump:
1. During normal operation, the pointer locates the start of the SPE (J1);
2. Any variation from the current pointer value is ignored unless a consistent new value is received three times
3. If the pointer value contains the Concatenation Value, then the operations performed on the STS-1 are identi-
4. If the majority of the I-bits of the pointer word are inverted, a positive stuff operation is indicated. Subsequent
5. If the majority of the D-bits of the pointer word are inverted, a negative stuff operation is indicated. Subsequent
6. If the New Data Flag is set to 1001, then the coincident pointer value will replace the current one at the offset
1. NDF = 1001 with pointer value > 782
2. NDF = 0110 and consistent value is received 3 times consecutively with pointer value > 782
3. 2 bits corruption in the NDF bits.
4. The pointer value is asking for increment and decrement at the same time and value of the pointer > 782.
a) NDF=0110 (can support one bit corruption)
b) 3 or more I-bits inverted
c) less than 3 D-bits inverted
a) NDF=0110 (can support one bit corruption)
b) 3 or more D-Bits inverted
c) less than 3 I-Bits inverted
a) NDF = 1001 (can support one bit corruption) with 10 bits pointer in the range (0-782)
b) NDF =0110 (can support one bit corruption) with 3 consecutive frames with same 10 bits pointer value in
range (0-782)
consecutively or it is preceded by one of rules 4,5 or 6. Any consistent new value received three times con-
secutively overrides (i.e. takes priority over) rules 4,5 or 6;
cal to those performed on the first STS-1 within the STS-Nc. Operations 4 and 5 do not apply to this pointer
value.
pointer values are incremented by one;
pointer values are decremented by one;
indicated by the new pointer value regardless of the state of the receive.
pointer and ignores the pointer value.
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