at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 778

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

41.11 Peripheral Timings
41.11.1
Table 41-34. EMAC Signals Relative to EMDC
41.11.1.1
Table 41-35. EMAC MII Specific Signals
Note:
778
Symbol
EMAC
EMAC
EMAC
Symbol
EMAC
EMAC
EMAC
EMAC
EMAC
EMAC
EMAC
EMAC
EMAC
EMAC
EMAC
EMAC
EMAC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1. VDDIO from 3.0V to 3.6V, maximum external capacitor = 20 pF
AT91SAM9G20 Preliminary
EMAC
MII Mode
Parameter
Setup for EMDIO from EMDC rising
Hold for EMDIO from EMDC rising
EMDIO toggling from EMDC rising
Parameter
Setup for ECOL from ETXCK rising
Hold for ECOL from ETXCK rising
Setup for ECRS from ETXCK rising
Hold for ECRS from ETXCK rising
ETXER toggling from ETXCK rising
ETXEN toggling from ETXCK rising
ETX toggling from ETXCK rising
Setup for ERX from ERXCK
Hold for ERX from ERXCK
Setup for ERXER from ERXCK
Hold for ERXER from ERXCK
Setup for ERXDV from ERXCK
Hold for ERXDV from ERXCK
Timings are given assuming a capacitance load on data and clock:
The Ethernet controller satisfies the timings of standard in MAX corner.
Table 1. Capacitance Load on data, clock pads
IO Supply
3.3V
1.8V
MAX
20pf
20pf
Corner
Min (ns)
Min (ns)
10 ns
10 ns
0 ns
10
10
10
10
10
10
10
10
10
10
10
10
10
6384B–ATARM–15-Dec-08
Max (ns)
Max (ns)
300 ns
25
25
25