MT90870 Zarlink Semiconductor, Inc., MT90870 Datasheet - Page 26

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

MT90870
Figure 13, Backplane Port External High Impedance Control Bit Timing (Non-32Mb/s mode) shows the channel
control bits for BCSTo0, BCSTo1, BCSTo2 and BCSTo3 in one possible scenario which includes stream
BSTo0 at a data-rate of 16.384Mb/s, BSTo1 at 8.192Mb/s, BSTo6 at 4.096Mb/s and BSTo7 at 2.048Mb/s. All
remaining streams are operated at a data-rate of 16.384Mb/s.
26
(16Mb/s)
BCSTo0
BCSTo1
BCSTo2
BCSTo3
(8Mb/s)
(2Mb/s)
(4Mb/s)
BSTo1
BSTo0
BSTo6
BSTo7
FP8o
C8o
Figure 13 - Backplane Port External High Impedance Control Bit Timing (Non-32Mb/s mode)
Chan 127
Chan 63
Chan 31
1
Bit 0
Bit 0
Bit 0
0
Chan 0
7
Bit 7
Chan 0 Bit 7
Channel 0
6
Chan 0
5
Bit 6
Channel 0 Bit 7
4
Chan 0
3
Bit 5
Chan 0 Bit 6
2
Chan 0
1
Bit 4
0
Chan 127
7
Bit 3
Chan 63 Bit 1
6
One C16o period
Channel 255 bits 7-0
Chan 127
5
Channel 31 Bit 0
Bit 2
4
Chan 127
3
Bit 1
Preliminary Information
Chan 63 Bit 0
2
Chan 127
1
Bit 0
0
Chan 0
Chan 0
7
Chan 0
Bit 7
Bit 7
Bit 7
6