Instruction Manual

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
t
CSH
t
CS
t
SKS
t
CSS
t
DIS
t
DIH
t
DH
EESK
EECS
EEData Out
EEData In
(Read)
Figure 48. EEPROM