M21050 Datasheet, PDF (13/70 Pages) M/A-COM Technology Solutions, Inc. – Duplex Quad Multi-Rate CDR

Functional Description
1.1.7
Multifunction Pins Defined for Hardwired Mode
A subset of options in the M21050 can be accessed with hardwired pins, as defined in Table 1-4. The hardwired
data-rates, along with the default reference frequency, are shown in Table 1-5.
Table 1-4.
Pin
MF0
MF1
MF2
MF3
MF4
MF5
MF6
MF7
Multifunction Pins for Hardwired Mode
Function
Description
Data-Rate 0
Data-Rate 1
Data-Rate 2
A-side equalization and
B-side pre-emphasis enable
B-side equalization and
A-side pre-emphasis enable
A-side polarity flip
B-side polarity flip
Output Level
CDR Rate Select (See Table 1-5 for description)
CDR Rate Select (See Table 1-5 for description)
CDR Rate Select (See Table 1-5 for description)
H = Disabled
L = A-side input equalization enabled, and
B-side output pre-emphasis enabled
H = Disabled
L = B-side input equalization enabled, and
A-side output pre-emphasis enabled
H = Normal data polarity
L = Inverted polarity
H = Normal data polarity
L = Inverted polarity
L = All outputs powered down
H = All outputs on: nominal output level. Output type selected with Out_Mode
Table 1-5. Hardwired Data-Rates and Associated Reference Clock Frequencies
Pins
MF [2:0]
Application
Signal Data-rate (Gbps)
Reference Frequency (MHz)
000
10x Fibre Channel - XAUI
001
10 Gigabit Ethernet - XAUI
010
InfiniBand
011
STS-48
100
InfiniBand
101
2x Fibre Channel
110
Gigabit Ethernet
111
1x Fibre Channel
3.1875
3.125
2.5
2.48832
2.5
2.125
1.250
1.0625
159.375
156.25
62.5
19.44
250
106.25
125
106.25
21050-DSH-001-F
Mindspeed Technologies™
5
Mindspeed Proprietary and Confidential