CS8900A-CQZ View Datasheet(PDF) - Cirrus Logic

Part Name

Description

Manufacturer

CS8900A-CQZ

Crystal LAN™ Ethernet Controller

Cirrus Logic 

CS8900A

Crystal LAN™ Ethernet Controller

SWITCHING CHARACTERISTICS (Continued)

Parameter

Symbol Min

Typ

Max Unit

16-Bit Memory Write

Address, SBHE, CHIPSEL valid to MEMCS16 low

Address, SBHE, CHIPSEL valid to MEMW low

MEMW pulse width

MEMW low to SD valid

SD hold after MEMW high

Address hold after MEMW inactive

MEMW inactive to active

10BASE-T Transmit

tMEMW1

-

-

tMEMW2

20

-

tMEMW3

110

-

tMEMW4

-

-

tMEMW5

0

-

tMEMW6

0

-

tMEMW7

35

-

30

ns

-

ns

-

ns

40

ns

-

ns

-

ns

-

ns

TXD Pair Jitter into 100 Ω Load

tTTX1

-

-

8

ns

TXD Pair Return to ≤ 50 mV after Last Positive Transition

tTTX2

-

-

4.5

µs

TXD Pair Positive Hold Time at End of Packet

tTTX3

250

-

-

ns

TXD±

SA [19:0],

SBHE,

C H IP S E L

MEMCS16

MEMW

S D [15 :0]

Valid Address

tMEMW1

tMEMW6

tMEMW2

tMEMW3

tMEMW7

tMEMW4

Valid D ata In

tMEMW5

Figure 40. 16-Bit Memory Write

D IR ECTIO N :

IN or OU T of chip

IN

OUT

IN

IN

tT T X 1

Figure 41. 10BASE-T Transmit

tTT X 2

tTT X 3

CIRRUS LOGIC PRODUCT DATASHEET

DS271F4

117

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