SMSC LAN9311 Manual De Usuario
Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08)
452
SMSC LAN9311/LAN9311i
DATASHEET
15.5.8
PIO Write Cycle Timing
Please refer to
for a functional description of this mode.
Note:
A PIO write cycle begins when both nCS and nWR are asserted. The cycle ends when either
or both nCS and nWR are de-asserted. These signals may be asserted and de-asserted in any
order.
or both nCS and nWR are de-asserted. These signals may be asserted and de-asserted in any
order.
Figure 15.8 PIO Write Cycle Timing
Table 15.12 PIO Write Cycle Timing Values
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
t
cycle
Write Cycle Time
45
nS
t
csl
nCS, nWR Assertion Time
32
nS
t
csh
nCS, nWR De-assertion Time
13
nS
t
asu
Address Setup to nCS, nWR Assertion
0
nS
t
ah
Address Hold Time
0
nS
t
dsu
Data Setup to nCS, nWR De-assertion
7
nS
t
dh
Data Hold Time
0
nS
t
ah
A[x:1], END_SEL
nCS, nWR
D[15:0]
t
asu
t
csl
t
cycle
t
csh
t
dh
t
dsu