NEC UPD98413 User Manual page 54

(e) The status transition of in the ITU-T mode
In the ITU-T mode, the overall status of the pointer changes depending on the status transition caused by the
pointer processing of H1#1 and H2#1 and on the status transition of each pointer caused by the
concatenation indication processing of H1#2 and H2#2 to H1#12 and H2#12.
Table 3-8 shows the status transition condition of pointer processing of H1#1 and H2#1, H1#2 and H2#2 to
H1#12 and H2#12. Figure 3-12 shows the pointer status transition(H1#1 and H2#1). Figure 3-13 shows the
concatenation status transition (H1#2 and H2#2 to H1#12 and H2#12). And Figure 3-13 shows the overall
status transition.
• • • • Pointer indication processing
H1#1 and H2#1 are independently checked in a pair of H1#1 and H2#1.
The Pointer indication processing is same as the Bellcore mode.
Note: In the ITU-T mode, some option mode must be configured by the MDPTRR register. The configuration is
as follow.
• • • • Concatenation indication processing
H1#2 and H2#2 to H1#12 and H2#12 are independently checked in a pair of H1#m and H2#m. The NDF,
SS bits, and pointer values extracted from each pair of bytes are classified into the following indication and
interpreted.
54
CHAPTER 3 FUNCTIONAL OUTLINE
Bit
LOPT
AIST1
AIST2
AISTD
LOPD[2:0]
Figure 3-12. Status Transition of Concatenation Indication
CONC
<4>
<1>
<3>
LOPC
<4>
H1#2 and H2#2
H1#3 and H2#3
H1#4 and H2#4
PRELIMINARY
Setting
Set to 1
Set to 1
Set to 1
Set to 1
Set to 100
<2>
<3>
AISC
H1#12 and H2#12
NEC confidential and Proprietary