Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK Data Sheet
Product codes
AT91SAM9G25-EK
1127
SAM9G25 [DATASHEET]
11032D–ATARM–10-Mar-2014
46.18.4 HSMCI
The High Speed MultiMedia Card Interface (HSMCI) supports the MultiMedia Card (MMC) Specification V4.3, the SD
Memory Card Specification V2.0, the SDIO V2.0 specification and CE-ATA V1.1.
Memory Card Specification V2.0, the SDIO V2.0 specification and CE-ATA V1.1.
46.18.5 EMAC
46.18.5.1 Timing conditions
46.18.5.2 Timing constraints
Note:
1.
For EMAC output signals, minimum and maximum access time are defined. The minimum access time is
the time between the EDMC rising edge and the signal change. The maximum access timing is the time
between the EDMC rising edge and the signal stabilizes.
the time between the EDMC rising edge and the signal change. The maximum access timing is the time
between the EDMC rising edge and the signal stabilizes.
illustrates minimum and maximum
accesses for EMAC3.
Figure 46-25.Min and Max access time of EMAC output signals
46.18.5.3 MII Mode
Table 46-44. Capacitance Load on Data, Clock Pads
Supply
Corner
Max
Typical Voltage High
Temperature
Min
3.3V
20 pF
20 pF
0 pF
1.8V
20 pF
20 pF
0 pF
Table 46-45. EMAC Signals Relative to EMDC
Symbol
Parameter
Min (ns)
Max (ns)
EMAC
1
Setup for EMDIO from EMDC rising
10
EMAC
2
Hold for EMDIO from EMDC rising
10
EMAC
3
EMDIO toggling from EMDC rising
0
300
EMDC
EMDIO
EMAC
3 max
EMAC
1
EMAC
2
EMAC
4
EMAC
5
EMAC
3 min
Table 46-46. EMAC MII Timings
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
EMAC
9
ETXEN toggling from ETXCK rising