MT90820
Pin #
84
52
53
100
25
26
CMOS
Advance Information
Pin Description
Name
AS/ALE
IM
Description
Address Strobe or Latch Enable:
This input is only used if multiplexed bus is
selected.
CPU Interface Mode (input):
If High, this input selects the multiplexed
microprocessor bus interface. If this input is not connected or grounded, the
device resumes non-multiplexed bus interface.
Address/Data Bus (Bidirectional):
These are bi-directional data pins on the
microprocessor interface. In the multiplexed bus mode, these pins also provide
the input address to the internal registers and memories.
Data Bus (Bidirectional):
These are additional bi-directional data pins on the
microprocessor interface.
Data Acknowledgement (Open Drain Output):
This active low output indicates
that a data bus transfer is complete. A 10 kohm pull-up resistor is required at this
output.
Control Output (output).
Output Device Enable (input):
This is the output enable control for the STo0 to
STo15 serial outputs. When this input is high, the STo0-15 output drivers function
normally. If this input is low, Sto0-15 are in high impedance. Note: Even when
ODE is high, each channel may still be put into high impedance state by using per
channel control bit in the connection memory.
Data Stream Output 0 to 7:
Serial data Output stream. These streams may have
data rates of 2.048, 4.096 or 8.192Mb/s.
Unused pins.
55 -
62
65 -
72
73
32-39
AD0 - 7
42-49
50
D8 - 15
DTA
74
76
55
57
CSTo
ODE
77 -
84
-
58-65
1 - 4,
27 -
30,
51 -
54
77 -
80
STo0 - 7
NC
2-182
MITEL [ MITEL NETWORKS CORPORATION ]
