mt8986al1 Zarlink Semiconductor, mt8986al1 Datasheet - Page 16

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

BIT
6-5
4-3
2-1
7
0
ODR1-0
SCB1-0
NAME
IDR1-0
CLKM
DMO
Device Main Operation. This bit is used by the CPU to define one of the two main operations of
the MT8986 device. If this bit is LOW, the MT8986 is configured for identical I/O data rates. For
this operation, the user should also specify the switching configuration through the SCB bits.
If this bit is HIGH, the MT8986 device is configured in Different I/O data rate. This allows
combinations of input and output data rates as shown in Table 2. The SCB bits have no effect in
this application and the device is in Non-Blocking switch configuration with a 256 x 256 channel
capacity.
Input Data Rate Selection. These two bits select three different data rates for the inputs of the
MT8986. In the case of identical I/O rates (DMO bit = 0), these bits also determine the serial
output data rate.
Output Data Rate Selection. These bits are only used when Different I/O rates are selected
(DMO bit=1). These two bits select three different data rates for the serial outputs of the MT8986.
These bits are ignored if DMO bit = 0.
Switching Configuration Bits 1-0. These bits should only be used when DMO is set LOW. The
use of these bits to select the switching configuration of the MT8986 device is described in Table
8.
Clock Mode. This bit is only used when the MT8986 device is set to operate in identical I/O data
rates. When set High, this bit selects the interface clock to be equal to the bit rate. If Low, this bit
selects the interface clock to be twice the bit rate.
For Different I/O data rate applications, this bit is ignored.
DMO
Interface Mode Selection Register - Read/Write
7
IDR1
ODR1
IDR1
0
0
1
1
6
0
0
1
1
Figure 4 - IMS Register Description
IDR0
5
Zarlink Semiconductor Inc.
IDR0
ODR0
0
1
0
1
0
1
0
1
ODR1
MT8986
4
16
ODR0
3
DESCRIPTION
Input Rate
2.048 Mb/s
4.096 Mb/s
8.192 Mb/s
reserved
Output Rate
2.048 Mb/s
4.096 Mb/s
8.192 Mb/s
reserved
SCB1
2
SCB0
1
CLKM
0
Data Sheet