MT90812 Mitel Networks Corporation, MT90812 Datasheet - Page 89

• Manufacturer Part Number: MT90812
• Description: Integrated Digital Switch (IDX)
• Manufacturer: Mitel Networks Corporation

Advance Information
Notes: 1. CMOS output 2. TTL input
24.1
The Expansion Bus operates in two modes; IDX Link and TDM Link modes (refer to Section 3.0). In TDM Link
mode there are three data rates supported, 2.048, 4.096, and 8.192 Mb/s. The IDX Link mode supports 8.192
Mb/s data rate. Depending on the Clock Control Mode selected the serial stream AC parameters are specified
with respect to a given clock reference. Table 22 lists the timing references used for the TDM streams given the
Clock Control Mode, PCS and PCOS settings. The timing diagrams to be used for the given TDM stream and
timing mode are listed for both ST-Bus and GCI modes. The clock reference is labelled, CLK, in each diagram
and is either C4i, C4o, C8 (as an input or output), or C16, where C16 refers to 16.384 MHz signal applied to
C8P_C16 pin. The frame pulse reference is labelled FP in each diagram and is either F4i, F4o, F8(input) or
F8(output).
EBUS 2 Mb/s
EBUS 2 Mb/s
Local 2 Mb/s
Local 2 Mb/s
EBUS 4Mb/s
(TDM Link)
(TDM Link)
(TDM Link)
F4i2
C4i
C16
F8
C8
F4o
C4o
C2o
Data Rate
TDM and
1
1
2
1
2
1
1
Timing References for TDM Streams
VH
VH
VH
VL
VL
VL
Control Mode
C4/F4
Clock
all
all
all
all
Figure 39 - C16 HMVIP Input Clock Reference
PCS
X
0
1
0
1
t
f4ol
t
F4iS
t
PC0S
f8ol
X
0
1
0
1
t
F4iW
t
t
t
c4od
c2od
c8od
(Output)
CLK
C4o
C4o
C4i
C4i
C8
t
t
F4iH
f8oh
(Output)
t
F4o
F4o
f4oh
F4i
F4i
FP
F8
t
diff
CLK Rate/
Data Rate
2
2
2
2
2
V
CT
Fig. 40 (ST-Bus) & Fig. 41
Fig. 40 (ST-Bus) & Fig. 41
Fig. 40 (ST-Bus) & Fig. 41
Fig. 40 (ST-Bus) & Fig. 41
Fig. 40 (ST-Bus) & Fig. 41
V
V
V
V
V
V
V
TT
TT
TT
CT
CT
CT
CT
Timing Diagram
MT90812
(GCI)
(GCI)
(GCI)
(GCI)
(GCI)
85