Switching characteristics, Figure 62. external boot prom access, Figure 63. eeprom – Cirrus Logic CS8900A User Manual
Page 131: Cs8900a, Crystal lan™ ethernet controller
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131
CS8900A
Crystal LAN™ Ethernet Controller
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SWITCHING CHARACTERISTICS
(Continued)
Parameter
Symbol
Min
Typ
Max
Unit
External Boot PROM Access
Address active to MEMR
t
BPROM1
20
-
-
ns
MEMR active to CSOUT low
t
BPROM2
-
-
35
ns
MEMR inactive to CSOUT high
t
BPROM3
-
-
40
ns
EEPROM
EESK Setup time relative to EECS
t
SKS
100
-
-
ns
EECS/ELCS_b Setup time wrt
↑ EESK
t
CCS
250
-
-
ns
EEDataOut Setup time wrt
↑ EESK
t
DIS
250
-
-
ns
EEDataOut Hold time wrt
↑ EESK
t
DIH
500
-
-
ns
EEDataIn Hold time wrt
↑ EESK
t
DH
10
-
-
ns
EECS Hold time wrt
↓ EESK
t
CSH
100
-
-
ns
Min EECS Low time during programming
t
CS
1000
-
-
ns
SA [19:0]
MEMR
t BPROM1
CSOUT
CS
t BPROM3
t BPROM2
Figure 62. External Boot PROM Access
tCSH
tCS
tSKS
tCSS
tDIS
tDIH
tDH
EESK
EECS
EEData Out
EEData In
(Read)
Figure 63. EEPROM
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