AL103 Revision 1.0
Table 42: PHY Management (MDIO) Write Timing
SYMBOL
DESCRIPTION
MDC high time.
MIN
420
420
840
40
TYP
425
425
850
-
MAX
UNIT
ns
tch
tcl
tmc
td
430
430
860
52
MDC low time.
MDC period.
ns
ns
MDIO output delay.
ns
MDC
tcl
tch
tmc
td
MDIO
Figure 12 PHY Management Write Timing
Table 43: SGRAM Refresh Timing
SYMBOL
tAH
DESCRIPTION
Access hold time.
MIN
1
TYP
MAX
UNIT
ns
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
tAS
Access setup time.
3
ns
tCH
PBCS#, PBRAS#, PBWE# hold time.
Clock high level width.
1
ns
tCHI
tCK
3.5
10
1
ns
System clock cycle time.
CKE hold time.
ns
ns
tCKH
tCKS
tCL
CKE setup time.
3
ns
Clock low level width.
3.5
3
ns
tCS
PBCS#, PBRAS#, PBWE# setup time.
Precharge command period.
Auto-refresh to auto-refresh period.
ns
tRP
30
90
ns
tRC
ns
9/00
Reference Only / Allayer Communications
53
ABC [ ABC Taiwan Electronics Corp ]
