FBFM2112F897CSLJLS View Datasheet(PDF) - Intel

Part Name

Description

Manufacturer

FBFM2112F897CSLJLS

Intel® FM2112 24-Port 10G/1G Ethernet Switch Chip

Intel 

Intel® FM2112 24-Port 10G/1G Ethernet Switch Chip Data Sheet

6.4.2

Table 187. List of No Connects and Unpopulated Ball Locations

Pins

AC13, AC14, AC15, AC16, AC17, AC18, AC19

AD13, AD14, AD15, AD16, AD17, AD18, AD19

P13, P14, P15, P16, P17, P18, P19

H13, H14, H15, H16, H17, H18, H19

J13, J14, J15, J16, J17, J18, J19

M8, M9, M23, M24

N8, N9, N23, N24

P8, P9, P23, P24

R8, R9, R23, R24

T8, T9, T23, T24

U8, U9, U23, U24

V8, V9, V23, V24

W8, W9, W23, W24

Y8, Y9, Y23, Y24

AB23, AC23, AC28, AC29, AC30, AC31,

AD23, R27, AE23, AE24, T27, G25, U27, H25, J26, J28, J29, K26,

K27, K28

Description

Ball grid locations that are not populated

with solder balls

No connects

Table 188. FM2112 Power Supply Signal Descriptions

Signal Name

VSS

VDD

VDD33

VDDA33

VDDA

VDDX

VTT

Quantity

305

80

12

1

18

85

48

Type

Power

Power

Power

Power

Power

Power

Power

Description

Ground, for Core and I/O

Core VDD (1.2 V)

I/O VDD (3.3 V), for LVTTL

PLL analog supply

SerDes bias voltage

SerDes supply voltage

TX termination voltage, which can be used

to adjust the common mode voltage and

swing of TX outputs

Recommended Connections

Ideally the following power supplies should be on the board containing

the FM2112:

• A 1.2 V source to supply the core (VDD)

• A 1.2 V or 1.0 V source to supply power to the SerDes (VDDX)

• A 1.2 V source to supply bias to the SerDes (VDDA)

• A 1.5 V typical source to terminate and set the common mode of the CML TX

interface (VTT)

• A 3.3 V supply for the LVTTL I/O signals (VDD33)

• A 3.3 V noise minimized source to supply the PLL (VDDA33)

147

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