
89
32117DS–AVR-01/12
AT32UC3C
Note:
1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
cess technology. These values are not covered by test limits in production.
Figure 7-21. Ethernet MAC RMII Mode
Table 7-61.
Ethernet MAC RMII Specific Sign
als(1)Symbol
Parameter
Conditions
Min.
Max.
Unit
MAC21
TX_EN toggling from TX_CLK rising
VVDD = 3.0V,
drive strength of the pads set to the
highest,
external capacitor = 10pF on MACB
pins
11.7
12.5
ns
MAC
22
TXD toggling from TX_CLK rising
11.7
12.5
ns
MAC23
Setup for RXD from TX_CLK
4.5
ns
MAC24
Hold for RXD from TX_CLK
0
ns
MAC
25
Setup for RX_ER from TX_CLK
3.4
ns
MAC26
Hold for RX_ER from TX_CLK
0
ns
MAC27
Setup for RX_DV from TX_CLK
4.4
ns
MAC
28
Hold for RX_DV from TX_CLK
0
ns
TX_CLK
TX_EN
MAC22
TXD[1:0]
RXD[3:0]
MAC25
MAC26
MAC27
MAC28
RX_ER
RX_DV
MAC21
MAC23
MAC24