Cirrus Logic CS8900A - Manual (Page 120)

120 DS271F5
CS8900A
Crystal LAN™ Ethernet Controller
CIRRUS LOGIC PRODUCT DATASHEET
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 47. External Boot PROM Access
tCSH
tCS
tSKS
tCSS
tDIS
tDIH
tDH
EESK
EECS
EEData Out
EEData In
(Read)
Figure 48. EEPROM