mt8986al1 Zarlink Semiconductor, mt8986al1 Datasheet - Page 15

• Manufacturer Part Number: mt8986al1
• Description: Multiple Rate Digital Switch
• Manufacturer: Zarlink Semiconductor

* - only in the 44 pin packages.
** - for Data Memory Read operations A0 is not required since two nibbles are provided per read access.
Note: In rate conversion applications, Data Memory subsections have different sizes than Connection Memory subsections. This
2 Mb/s to 4
2 Mb/s to 8
4 Mb/s to 2
8 Mb/s to 2
Nibble Switch
Different
Rate
Mb/s
Mb/s
Mb/s
Mb/s
Identical
2 Mb/s *
(2 Mb/s)
I/O
4 Mb/s
4 Mb/s
8 Mb/s
implies that different address inputs are used to select individual positions within the subsections for each type of memory.
Rate
I/O
Streams
Input x
Config.
Output
8x4
8x2
4x8
2x8
# of Input x
Streams
Output
16x8 *
4x4
8x4
2x2
8x4
Table 7 - Use of STA Bits for Different I/O Data Rate Operation
Table 6 - Use of STA Bits for Identical I/O Data Rate Operation
STA2, STA1,
STA0
STA2, STA1,
STA0
STA1, STA0
STA0
STA bits used to
subsections
Memory
select
Data
STA3, STA2, STA1,
STA0
STA1, STA0
STA2, STA1, STA0
STA0
STA2, STA1, STA0
select subsections of
STA bits used to
Memory
the Data
STA1, STA0
STA0
STA2, STA1,
STA0
STA2, STA1,
STA0
STA bits used to
Connection
subsections
Zarlink Semiconductor Inc.
Memory
select
MT8986
15
STA2, STA1, STA0
STA1, STA0
STA1, STA0
STA0
STA1, STA0
select subsections of
A4, A3, A2, A1, A0
A4, A3, A2, A1, A0
A6, A4, A3, A2, A1, A0
A7, A6, A4, A3, A2, A1, A0 A4, A3, A2, A1, A0
Input Address pins used to
STA bits used to
the Connection
access individual Data
positions within the
selected subsection
Memory
Memory
A4, A3, A2, A1, A0
A6, A4, A3, A2, A1, A0
A6, A4, A3, A2, A1, A0
A7, A6, A4, A3, A2, A1, A0
A6, A4, A3, A2, A1, A0 **
within the selected subsection
select individual Connection
and Data Memory positions
Input Address pins used to
A6, A4, A3, A2, A1, A0
A7, A6, A4, A3, A2, A1, A0
Input Address pins used to
A4, A3, A2, A1, A0
Connection Memory
positions within the
selected subsection
access individual
Data Sheet