Freescale Semiconductor MPC8260 PowerQUICC II Family Reference Manual page 868

Multi-Channel Controllers (MCCs)
Table 28-10. Channel-Specific Parameters for SS7 (continued)
1 2
Offset Name
0x38 MFLR
0x3A MAX_cnt
0x3C RCRC
0x40 N
N_cnt
JTSTTmp
0x44 D
0x46 D_cnt
JTTDelay
0x48 Mask1
0x4C Mask2
0x4E SS7_OPT
0x50 LRB1_Tmp
0x54 LRB2_Tmp
0x56 SUERM
0x58 LRB1
0x5C LRB2
0x5E T
0x60 LHDR
0x64 LHDR_Tmp Word
28-20
Width
Hword Maximum frame length register. Defines the longest expected frame for this channel.
(64-Kbyte maximum). The remainder of a frame that is larger than MFLR is discarded
and the LG flag is set in the last frame's BD. An interrupt request might be generated
(RXF and RXB) depending on the interrupt mask. A frame's length is considered to
be everything between flags, including CRC. No more data is written into the current
buffer when the MFLR violation is detected.
Hword Max_length counter, used by the CP (read-only for the user)
Word Temporary receive CRC, used by the CP (read-only for the user)
Hword Applies to ITU-T/ANSI SS7 only. Interrupt threshold in octet counting mode (N=16).
See Section 28.3.4.2, "Signal Unit Error Monitor (SUERM)—SS7 Mode
Hword Applies to ITU-T/ANSI SS7 only. Temporary down counter for N (user initialized to
the value of N).
Word Applies to Japanese SS7 only. Temporary storage for Time-Stamp Register Value.
Used by the CP to implement a 24-ms delay before sending FISU.
Hword Signal unit to signal unit error ratio (SUERM parameter, user initialized to 256). See
Section 28.3.4.2, "Signal Unit Error Monitor (SUERM)—SS7 Mode
Hword Applies to ITU-T/ANSI SS7 only. Temporary down-counter for D (user initialized to
the value of D). D_cnt is decremented only when receive buffers are available.
Applies to Japanese SS7 only. FISU retransmission delay (specified in units of
512¨µs). According to the Japanese SS7 standard, the delay should be 24 ms and
thus JTTDelay should be programmed to 24 ms/512 µs = 46.875 (approximately 47).
Hence, the user should program JTTDelay to 0x2F and the RTSCR to generate a 1
µs time stamp period. Refer to
(RTSCR)".
Word Mask for SU filtering, bytes 0-3. See
Hword Mask for SU filtering, byte 4. See
Hword SS7 configuration register. See
Mode."
Word Temporary storage, used by CP for SU filtering.
Hword Temporary storage, used by CP for SU filtering.
Hword Signal unit error rate monitor counter (user initialized to 0). See
"Signal Unit Error Monitor (SUERM)—SS7
Word Four first bytes of last received signal unit. Used by CP for SU filtering. See
"SU Filtering—SS7
Hword Fifth byte of last received signal unit. Used by CP for SU filtering. See
Filtering—SS7 Mode
Hword SUERM threshold value (user initialized to 64). See
Error Monitor (SUERM)—SS7
Word The BSN, BIB, FSN, FIB fields of last transmitted signal unit and result of CRC. Used
by CP for automatic FISU transmission.
Temporary storage, used by CP for automatic FISU transmission.
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Description
Section 14.3.8, "RISC Time-Stamp Control Register
28.3.4.4, "SU Filtering—SS7 Mode
28.3.4.4, "SU Filtering—SS7 Mode
Section 28.3.4.3, "SS7 Configuration Register—SS7
Mode."
Mode."
Mode."
Section 28.3.4.2,
28.3.4.4,
28.3.4.4, "SU
Section 28.3.4.2, "Signal Unit
Freescale Semiconductor