
KS8695X
Micrel
M9999-102604
36
October 2004
Figure 9. External I/O Read and Write Cycles
Symbol
Parameter(1)
Registers
EBiTACS
Programmable bank i address setup time before chip select
0x4000, 0x4004, 0x4008
EBiTACT
Programmable bank i write enable/output enable access time
0x4000, 0x4004, 0x4008
EBiTCOS
Programmable bank i chip select setup time before OEN
0x4000, 0x4004, 0x4008
EBiTCOH
Programmable bank i chip select hold time
0x4000, 0x4004, 0x4008
Table 6. Programmable External I/O Timing Parameters
Note:
1. "i" Refers to chip select parameters 0, 1, or 2.
Symbol
Parameter
Min(1)
Typ(1)
Max(1)
Units
T
cta
Valid address to CS setup
EBiTACS EBiTACS EBiTACS
+0.8
+1.1
+1.3
ns
T
cos
CS valid to OE setup time
EBiTCOS EBiTCOS EBiTCOS
+0.6
+1.0
ns
T
dsu
Valid read data to OE setup time
2.0
ns
T
cws
CS valid to WE setup time
EBiTCOS EBiTCOS EBiTCOS
+0.6
+1.0
ns
T
dh
CS to write data hold time
0
ns
T
cah
CS to ADDR hold time
EBiTCOH EBiTCOH EBiTCOH
+1.0
+1.4
ns
T
oew
OE/WE pulsewidth
EBiTACT
ns
T
ocs, Tcsw
Rising edge OE/WE to CS hold time
0
ns
Table 5. External I/O Memory Timing Parameters
Note:
1. Measurements for minimum were taken at 0oC, typical at 25oC, and maximum at 100oC.