OMAP-L137
www.ti.com
SPRS563G – SEPTEMBER 2008 – REVISED JUNE 2014
Table 6-68. Additional
(1)
SPI1 Master Timings, 5-Pin Option
(2) (3)
No.
PARAMATER
MIN
MAX
UNIT
Polarity = 0, Phase = 0,
0.5t
c(SPC)M
+P+5
from SPI1_CLK falling
Max delay for slave to
Polarity = 0, Phase = 1,
P+5
deassert SPI1_ENA after final from SPI1_CLK falling
18
t
d(SPC_ENA)M
SPI1_CLK edge to ensure
ns
Polarity = 1, Phase = 0,
master does not begin the
0.5t
c(SPC)M
+P+5
from SPI1_CLK rising
next transfer.
(4)
Polarity = 1, Phase = 1,
P+5
from SPI1_CLK rising
Polarity = 0, Phase = 0,
0.5t
c(SPC)M
+ P -3
from SPI1_CLK falling
Polarity = 0, Phase = 1,
Delay from final SPI1_CLK
P - 3
from SPI1_CLK falling
edge to
20
t
d(SPC_SCS)M
ns
master deasserting
Polarity = 1, Phase = 0,
0.5t
c(SPC)M
+ P -3
SPI1_SCS
(5) (6)
from SPI1_CLK rising
Polarity = 1, Phase = 1,
P - 3
from SPI1_CLK rising
Max delay for slave SPI to drive SPI1_ENA valid after
21
t
d(SCSL_ENAL)M
master asserts SPI1_SCS to delay the
C2 P
ns
master from beginning the next transfer,
Polarity = 0, Phase = 0,
2P -5
to SPI1_CLK rising
Polarity = 0, Phase = 1,
0.5t
c(SPC)M
+ 2P -5
to SPI1_CLK rising
Delay from SPI1_SCS active
22
t
d(SCS_SPC)M
ns
to first SPI1_CLK
(7) (8) (9)
Polarity = 1, Phase = 0,
2P -5
to SPI1_CLK falling
Polarity = 1, Phase = 1,
0.5t
c(SPC)M
+ 2P -5
to SPI1_CLK falling
Polarity = 0, Phase = 0,
3P + 3
to SPI1_CLK rising
Polarity = 0, Phase = 1,
0.5t
c(SPC)M
+ 3P + 3
Delay from assertion of
to SPI1_CLK rising
23
t
d(ENA_SPC)M
SPI1_ENA low to first
ns
Polarity = 1, Phase = 0,
SPI1_CLK edge.
(10)
3P + 3
to SPI1_CLK falling
Polarity = 1, Phase = 1,
0.5t
c(SPC)M
+ 3P + 3
to SPI1_CLK falling
(1)
These parameters are in addition to the general timings for SPI master modes (
Table 6-65
).
(2)
P = SYSCLK2 period
(3)
Figure shows only Polarity = 0, Phase = 0 as an example. Table gives parameters for all four master clocking modes.
(4)
In the case where the master SPI is ready with new data before SPI1_ENA deassertion.
(5)
Except for modes when SPIDAT1.CSHOLD is enabled and there is additional data to transmit. In this case, SPI1_SCS will remain
asserted.
(6)
This delay can be increased under software control by the register bit field SPIDELAY.T2CDELAY[4:0].
(7)
If SPI1_ENA is asserted immediately such that the transmission is not delayed by SPI1_ENA.
(8)
In the case where the master SPI is ready with new data before SPI1_SCS assertion.
(9)
This delay can be increased under software control by the register bit field SPIDELAY.C2TDELAY[4:0].
(10) If SPI1_ENA was initially deasserted high and SPI1_CLK is delayed.
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