MC68181 Datasheet, PDF (97/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

Freescale Semiconductor, Inc.
MC68181
Decoder-to-Host Packet Descriptions
Roaming Status Packet
The FLEX chip IC will prompt the host to read a Roaming Status Packet if RSR, MS1,
MFI, MS2, MBI, MAW, NDR₁, NDR₀, NBU, or SCU is set.
Table 1: Roaming Status Packet Bit Assignments
Byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
3
0
1
1
0
0
0
0
0
2
RSR
MS1
MFI
MS2
MBI MAW NBU
n
1
x
x
x
x
x
x
NDR₁ NDR₀
0
x
x
x
x
SCU
RSC₂
RSC₁
RSC₀
RE-SYNCHRONIZATION SIGNAL RECEIVED (RSR)
This bit is set when the FLEX chip detected a re-synchronization signal and the host
configured FLEX chip to ignore it via the IRS bit in the roaming control packet. This
bit is cleared when read.
MISSED SYNCHRONIZATION 1 (MS1)
This bit is set when the FLEX chip failed to detect the first synchronization pattern
(A / A) of a FLEX frame and FLEX chip was configured to report missed frame
information via the MFC bit in the roaming control packet. This bit is cleared when
read.
MISSED FRAME INFORMATION WORD (MFI)
This bit is set when the frame information word is received with an uncorrectable
number of errors and FLEX chip was configured to report missed frame information
via the MFC bit in the roaming control packet. This bit is cleared when read.
MISSED SYNCHRONIZATION 2 (MS2)
This bit is set when the FLEX chip failed to detect the second synchronization pattern
(C / C) of a frame and FLEX chip was configured to report missed frame information
via the MFC bit in the roaming control packet. This bit is cleared when read.
MISSED BLOCK INFORMATION WORD (MBI)
This bit is set when at least one of the block information word ones is received with
an uncorrectable number of errors and FLEX chip was configured to report missed
frame information via the MFC bit in the roaming control packet. This bit is set no
more than once per frame regardless of the number of phases in the frame. This bit is
cleared when read.
MOTOROLA
MC68181 Technical Data Sheet
For More Information On This Product,
Go to: www.freescale.com
B-37