MT90870 Zarlink Semiconductor, Inc., MT90870 Datasheet - Page 5

• Manufacturer Part Number: MT90870
• Description: Flexible 12k Digital Switch (F12kDX)
• Manufacturer: Zarlink Semiconductor, Inc.

Preliminary Information
Pin Description (continued)
BSTo0 - 15
BSTo16 - 31
BCSTo0-3
Name
C5, B5, A5 C4, A4,
A3, B1, B2, B3,
C1, C2, D1, D2,
D3, E1, E2
E3, E4, F1, F2, F3,
G1, G2, G3, G4,
H1, H2, H3, J1, J2,
J3, J4
C14, A15, B15,
C15
Coordinates
Package
Backplane Serial Output Streams 0 to 15 (5V Tolerant, Three-state
Outputs).
In Non-32Mb/s Mode, these pins output serial TDM data streams at a
data-rate of :
16.384 Mb/s (with 256 channels per stream),
8.192 Mb/s (with 128 channels per stream),
4.096 Mb/s (with 64 channels per stream), or
2.048Mb/s (with 32 channels per stream).
The data-rate is independently programmable for each output stream.
In 32Mb/s Mode, these pins output serial TDM data streams at a fixed
data-rate of 32.768 Mb/s (with 512 channels per stream).
Refer to descriptions of the BORS and ODE pins for control of the output
High or High-Impedance state.
Backplane Serial Output Streams 16 to 31 (5V Tolerant Three-state
Outputs).
In Non-32Mb/s Mode, these pins output serial TDM data streams at a
data-rate of :
16.384 Mb/s (with 256 channels per stream),
8.192 Mb/s (with 128 channels per stream),
4.096 Mb/s (with 64 channels per stream), or
2.048Mb/s (with 32 channels per stream).
The data-rate is independently programmable for each output stream.
These pins are unused when the 32Mb/s Mode is selected.
Refer to descriptions of the BORS and ODE pins for control of the output
High or High-Impedance state.
Backplane Output Channel High Impedance Control (5V Tolerant
Three-state Outputs). Active high output enable which may be used to
control external buffering individually for a set of Backplane output
streams on a per channel basis.
In non-32Mb/s mode (stream rates 2Mb/s to 16Mb/s):
BCSTo0 is the output enable for BSTo[0,4,8,12,16,20,24,28],
BCSTo1 is the output enable for BSTo[1,5,9,13,17,21,25,29],
BCSTo2 is the output enable for BSTo[2,6,10,14,18,22,26,30],
BCSTo3 is the output enable for BSTo[3,7,11,15,19,23,27,31].
In 32Mb/s mode (stream rate 32Mb/s):
BCSTo0 is the output enable for BSTo[0,4,8,12],
BCSTo1 is the output enable for BSTo[1,5,9,13],
BCSTo2 is the output enable for BSTo[2,6,10,14],
BCSTo3 is the output enable for BSTo[3,7,11,15].
Refer to descriptions of the BORS and ODE pins for control of the output
High or High-Impedance state.
Description
MT90870
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