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

External Boot PROM Access

Address active to MEMR

MEMR active to CSOUT low

MEMR inactive to CSOUT high

EEPROM

EESK Setup time relative to EECS

EECS/ELCS_b Setup time wrt ↑ EESK

EEDataOut Setup time wrt ↑ EESK

EEDataOut Hold time wrt ↑ EESK

EEDataIn Hold time wrt ↑ EESK

EECS Hold time wrt ↓ EESK

Min EECS Low time during programming

Symbol Min

Typ

Max Unit

tBPROM1

20

-

tBPROM2

-

-

tBPROM3

-

-

tSKS

100

-

tCCS

250

-

tDIS

250

-

tDIH

500

-

tDH

10

-

tCSH

100

-

tCS

1000

-

-

ns

35

ns

40

ns

-

ns

-

ns

-

ns

-

ns

-

ns

-

ns

-

ns

CS

SA [19:0]

MEMR

CSOUT

tBPROM1

tBPROM2

tBPROM3

Figure 62. External Boot PROM Access

EESK

EECS

EEData Out

EEData In

(Read)

DS271F4

t SKS

t CSS

tDIH

t D IS

t CSH

t CS

t DH

Figure 63. EEPROM

CIRRUS LOGIC PRODUCT DATASHEET

131

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