tmxf28155 ETC-unknow, tmxf28155 Datasheet - Page 511

• Manufacturer Part Number: tmxf28155
• Description: Tmxf28155 Super Mapper 155/51 Mbits/s Sonet/sdh X28/x21 Ds1/e1
• Manufacturer: ETC-unknow

Preliminary Data Sheet
May 2001
21 28-Channel Framer Block Functional Description
21.22.6 Receive Data Link Stack Idle Modes
No data link stack features for the following frame formats:
21.22.7 Receive Data Link Stack Pointer
The stack pointer maintains two pointers: an internal pointer and a host pointer. The pointer identifies which stack
is active for the host and which stack is active for the internal logic. These pointers will always point to opposite
stacks. When the TDM interface block is writing Sa bits or D bits to the stack, then the internal pointer may be
selecting the upper stack. In this case, the host pointer is selecting the lower stack for the host reads. At the begin-
ning of each double multiframe or each superframe, a pointer switch takes place. This switch takes place during the
time in which the host is prevented from accessing the stack for a particular link.
A stack pointer is maintained for each of the links individually.
Agere Systems Inc.
D4
J-D4
ESF
J-ESF
J2
CMI
R
LINE
X
R EG IST ERS
D AT A LINK INT ERR U PT
HO ST
PR OC ES SO R
CLO C K
RE CE IVE
FRA M ER
Figure 61. Rx Data Link Block Diagram
STA CK FU LL
INT ER NA L
FD L
C LO CK
PO IN TER
STA CK
IN TE RN AL BU S
TD M DA TA
TD M ID
TD M IN TE RFA CE
R
R
S HA RE D
S HA RE D
X
X
S TAC K
S TAC K
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
LO WER
U PP ER
C EPT A ND
S LC- 96
D ATA
INT ER FACE
SY STE M
(continued)
TMXF28155/51 Super Mapper
TR AN SM IT
SY STE M
5-9025(F)r.1
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