Справочник Пользователя для SMSC LAN9500i
Hi-Speed USB 2.0 to 10/100 Ethernet Controller
Datasheet
SMSC LAN9500/LAN9500i
35
Revision 1.7 (10-02-08)
DATASHEET
4.5.3
Reset and Configuration Strap Timing
illustrates the nRESET pin timing requirements and its relation to the configuration strap
pins and output drive. Assertion of nRESET is not a requirement. However, if used, it must be asserted
for the minimum period specified.
for the minimum period specified.
Figure 4.3 nRESET Reset Pin Timing
Table 4.10 nRESET Reset Pin Timing Values
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
t
rstia
nRESET input assertion time
1
uS
t
css
Configuration strap pins setup to nRESET deassertion
200
nS
t
csh
Configuration strap pins hold after nRESET deassertion
10
nS
t
odad
Output drive after deassertion
30
nS
t
css
nRESET
Configuration
Strap Pins
t
rstia
t
csh
Output Drive
t
odad