7.24.3.4 MMC3 and MMC4, SD SDR25 Mode
Figure 7-87, Figure 7-88, and Table 7-125, through Table 7-128 present Timing requirements and Switching characteristics for MMC3 and MMC4 - SD and SDIO SDR25 in receiver and transmitter mode.
Table 7-125 Timing Requirements for MMC3 - SDR25 Mode (1)
NO. |
PARAMETER |
DESCRIPTION |
MIN |
MAX |
UNIT |
SDR253 |
tsu(cmdV-clkH) |
Setup time, mmc3_cmd valid before mmc3_clk rising clock edge |
5.3 |
|
ns |
SDR254 |
th(clkH-cmdV) |
Hold time, mmc3_cmd valid after mmc3_clk rising clock edge |
1.6 |
|
ns |
SDR257 |
tsu(dV-clkH) |
Setup time, mmc3_dat[i:0] valid before mmc3_clk rising clock edge |
5.3 |
|
ns |
SDR258 |
th(clkH-dV) |
Hold time, mmc3_dat[i:0] valid after mmc3_clk rising clock edge |
1.6 |
|
ns |
- i in [i:0] = 7
Table 7-126 Switching Characteristics for MMC3 - SDR25 Mode (2)
NO. |
PARAMETER |
DESCRIPTION |
MIN |
MAX |
UNIT |
SDR251 |
fop(clk) |
Operating frequency, mmc3_clk |
|
48 |
MHz |
SDR252H |
tw(clkH) |
Pulse duration, mmc3_clk high |
0.5*P-0.270 (1) |
|
ns |
SDR252L |
tw(clkL) |
Pulse duration, mmc3_clk low |
0.5*P-0.270 (1) |
|
ns |
SDR255 |
td(clkL-cmdV) |
Delay time, mmc3_clk falling clock edge to mmc3_cmd transition |
-8.8 |
6.6 |
ns |
SDR256 |
td(clkL-dV) |
Delay time, mmc3_clk falling clock edge to mmc3_dat[i:0] transition |
-8.8 |
6.6 |
ns |
- P = output mmc3_clk period in ns
- i in [i:0] = 7
Table 7-127 Timing Requirements for MMC4 - SDR25 Mode (1)
NO. |
PARAMETER |
DESCRIPTION |
MIN |
MAX |
UNIT |
SDR255 |
tsu(cmdV-clkH) |
Setup time, mmc4_cmd valid before mmc4_clk rising clock edge |
5.3 |
|
ns |
SDR256 |
th(clkH-cmdV) |
Hold time, mmc4_cmd valid after mmc4_clk rising clock edge |
1.6 |
|
ns |
SDR257 |
tsu(dV-clkH) |
Setup time, mmc4_dat[i:0] valid before mmc4_clk rising clock edge |
5.3 |
|
ns |
SDR258 |
th(clkH-dV) |
Hold time, mmc4_dat[i:0] valid after mmc4_clk rising clock edge |
1.6 |
|
ns |
- i in [i:0] = 3
Table 7-128 Switching Characteristics for MMC4 - SDR25 Mode (2)
NO. |
PARAMETER |
DESCRIPTION |
MIN |
MAX |
UNIT |
SDR251 |
fop(clk) |
Operating frequency, mmc4_clk |
|
48 |
MHz |
SDR252H |
tw(clkH) |
Pulse duration, mmc4_clk high |
0.5*P-0.270 (1) |
|
ns |
SDR252L |
tw(clkL) |
Pulse duration, mmc4_clk low |
0.5*P-0.270 (1) |
|
ns |
SDR255 |
td(clkL-cmdV) |
Delay time, mmc4_clk falling clock edge to mmc4_cmd transition |
-8.8 |
6.6 |
ns |
SDR256 |
td(clkL-dV) |
Delay time, mmc4_clk falling clock edge to mmc4_dat[i:0] transition |
-8.8 |
6.6 |
ns |
- P = output mmc4_clk period in ns
- i in [i:0] = 3