CS8900A-CQZ データシートの表示（PDF） - Cirrus Logic

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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

EESK

EECS

EEData Out

EEData In

(Read)

120

tBPROM1

tBPROM2

tBPROM3

Figure 47. External Boot PROM Access

t SKS

t CSS

tDIH

t D IS

t CSH

t CS

t DH

Figure 48. EEPROM

CIRRUS LOGIC PRODUCT DATASHEET

DS271F4

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