11 emac timings – Rainbow Electronics AT91CAP9S250A User Manual
Page 984
984
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
47.10.11 EMAC Timings
The Ethernet controller satisfies the timings of standard given in
and
, in
MAX and STH corners.
Timings are given assuming a capacitance load on data and clock:
47.10.11.1
MII Mode
Note:
1. VDDIO from 3.0V to 3.6V, maximum external capacitor = 20 pF
Table 47-44. Capacitance Load on Data, Clock Pads
Corner
Supply
Max
STH
Min
3.3V
20pf
20pf
20pf
1.8V
20pf
20pf
205pf
Table 47-45. EMAC Signals Relative to EMDC
Symbol
Parameter
Min (ns)
Max (ns)
EMAC
1
Setup for EMDIO from EMDC rising
10 ns
EMAC
2
Hold for EMDIO from EMDC rising
10 ns
EMAC
3
EMDIO toggling from EMDC rising
0 ns
300 ns
Table 47-46. EMAC MII Specific Signals
Symbol
Parameter
Min (ns)
Max (ns)
EMAC
4
Setup for ECOL from ETXCK rising
10
EMAC
5
Hold for ECOL from ETXCK rising
10
EMAC
6
Setup for ECRS from ETXCK rising
10
EMAC
7
Hold for ECRS from ETXCK rising
10
EMAC
8
ETXER toggling from ETXCK rising
10
25
EMAC
9
ETXEN toggling from ETXCK rising
10
25
EMAC
10
ETX toggling from ETXCK rising
10
25
EMAC
11
Setup for ERX from ERXCK
10
EMAC
12
Hold for ERX from ERXCK
10
EMAC
13
Setup for ERXER from ERXCK
10
EMAC
14
Hold for ERXER from ERXCK
10
EMAC
15
Setup for ERXDV from ERXCK
10
EMAC
16
Hold for ERXDV from ERXCK
10