OMAP-L137
SPRS563G – SEPTEMBER 2008 – REVISED JUNE 2014
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Table 6-66. Additional
(1)
SPI1 Master Timings, 4-Pin Enable Option
(2) (3)
No.
PARAMETER
MIN
MAX
UNIT
Polarity = 0, Phase = 0,
3P + 3
to SPI1_CLK rising
Polarity = 0, Phase = 1,
0.5t
c(SPC)M
+ 3P + 3
Delay from slave assertion of
to SPI1_CLK rising
17
t
d(EN A_SPC)M
SPI1_ENA active to first SPI1_CLK
ns
Polarity = 1, Phase = 0,
from master.
(4)
3P + 3
to SPI1_CLK falling
Polarity = 1, Phase = 1,
0.5t
c(SPC)M
+ 3P + 3
to SPI1_CLK falling
Polarity = 0, Phase = 0,
0.5t
c(SPC)M
+ P + 5
from SPI1_CLK falling
Polarity = 0, Phase = 1,
Max delay for slave to deassert
P + 5
from SPI1_CLK falling
SPI1_ENA after final SPI1_CLK edge
18
t
d(SPC_ENA)M
ns
to ensure master does not begin the
Polarity = 1, Phase = 0,
0.5t
c(SPC)M
+ P + 5
next transfer.
(5)
from SPI1_CLK rising
Polarity = 1, Phase = 1,
P + 5
from SPI1_CLK rising
(1)
These parameters are in addition to the general timings for SPI master modes (
Table 6-64
).
(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 assertion.
(5)
In the case where the master SPI is ready with new data before SPI1_ENA deassertion.
Table 6-67. Additional
(1)
SPI1 Master Timings, 4-Pin Chip Select Option
(2) (3)
No.
PARAMATER
MIN
MAX
UNIT
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 to first
19
t
d(SCS_SPC)M
ns
SPI1_CLK
(4) (5)
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,
0.5t
c(SPC)M
+ P - 3
from SPI1_CLK falling
Polarity = 0, Phase = 1,
P - 3
from SPI1_CLK falling
Delay from final SPI1_CLK edge to
20
t
d(SPC_SCS)M
ns
master deasserting SPI1_SCS
(6) (7)
Polarity = 1, Phase = 0,
0.5t
c(SPC)M
+ P -3
from SPI1_CLK rising
Polarity = 1, Phase = 1,
P - 3
from SPI1_CLK rising
(1)
These parameters are in addition to the general timings for SPI master modes (
Table 6-64
).
(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_SCS assertion.
(5)
This delay can be increased under software control by the register bit field SPIDELAY.C2TDELAY[4:0].
(6)
Except for modes when SPIDAT1.CSHOLD is enabled and there is additional data to transmit. In this case, SPI1_SCS will remain
asserted.
(7)
This delay can be increased under software control by the register bit field SPIDELAY.T2CDELAY[4:0].
140
Peripheral Information and Electrical Specifications
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