Table 7-29, Table 7-30, Figure 7-27, Table 7-31, Figure 7-28, Table 7-32, and Figure 7-29 present timing conditions, requirements, and switching characteristics for CPSW3G
RMII.
Table 7-29 CPSW3G RMII Timing Conditions
PARAMETER |
MIN |
MAX |
UNIT |
INPUT
CONDITIONS |
SRI |
Input slew
rate |
VDD(1) = 1.8V |
0.18 |
0.54 |
V/ns |
VDD(1) = 3.3V |
0.4 |
1.2 |
V/ns |
OUTPUT
CONDITIONS |
CL |
Output
load capacitance |
3 |
25 |
pF |
(1) VDD stands for corresponding power
supply. For more information on the power supply name and the corresponding ball(s), see
POWER column of the Pin Attributes table.
Table 7-30 RMII[x]_REF_CLK Timing Requirements –
RMII Mode see Figure 7-27
NO. |
PARAMETER |
DESCRIPTION |
MIN |
MAX |
UNIT |
RMII1 |
tc(REF_CLK) |
Cycle time, RMII[x]_REF_CLK |
19.999 |
20.001 |
ns |
RMII2 |
tw(REF_CLKH) |
Pulse Duration, RMII[x]_REF_CLK High |
7 |
13 |
ns |
RMII3 |
tw(REF_CLKL) |
Pulse Duration, RMII[x]_REF_CLK Low |
7 |
13 |
ns |
Table 7-31 RMII[x]_RXD[1:0], RMII[x]_CRS_DV, and
RMII[x]_RX_ER Timing Requirements – RMII Mode see Figure 7-28
NO. |
PARAMETER |
DESCRIPTION |
MIN |
MAX |
UNIT |
RMII4 |
tsu(RXD-REF_CLK) |
Setup time, RMII[x]_RXD[1:0] valid before
RMII[x]_REF_CLK |
4 |
|
ns |
tsu(CRS_DV-REF_CLK) |
Setup time, RMII[x]_CRS_DV valid before
RMII[x]_REF_CLK |
4 |
|
ns |
tsu(RX_ER-REF_CLK) |
Setup time, RMII[x]_RX_ER valid before
RMII[x]_REF_CLK |
4 |
|
ns |
RMII5 |
th(REF_CLK-RXD) |
Hold time RMII[x]_RXD[1:0] valid after
RMII[x]_REF_CLK |
2 |
|
ns |
th(REF_CLK-CRS_DV) |
Hold time, RMII[x]_CRS_DV valid after
RMII[x]_REF_CLK |
2 |
|
ns |
th(REF_CLK-RX_ER) |
Hold time, RMII[x]_RX_ER valid after
RMII[x]_REF_CLK |
2 |
|
ns |
Table 7-32 RMII[x]_TXD[1:0], and RMII[x]_TX_EN
Switching Characteristics – RMII Mode see Figure 7-29
NO. |
PARAMETER |
DESCRIPTION |
MIN |
MAX |
UNIT |
RMII6 |
td(REF_CLK-TXD) |
Delay time, RMII[x]_REF_CLK High to RMII[x]_ TXD[1:0]
valid |
2 |
10 |
ns |
td(REF_CLK-TX_EN) |
Delay time, RMII[x]_REF_CLK to RMII[x]_TX_EN
valid |
2 |
10 |
ns |