OMAP-L137
SPRS563G – SEPTEMBER 2008 – REVISED JUNE 2014
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6.17.2 SPI Electrical Data/Timing
6.17.2.1 Serial Peripheral Interface (SPI) Timing
Table 6-56
through
Table 6-71
assume testing over recommended operating conditions (see
Figure 6-38
through
Figure 6-41
).
Table 6-56. General Timing Requirements for SPI0 Master Modes
(1)
No.
PARAMETER
MIN
MAX
UNIT
1
t
c(SPC)M
Cycle Time, SPI0_CLK, All Master Modes
greater of 3P or 20
256P
ns
2
t
w(SPCH)M
Pulse Width High, SPI0_CLK, All Master Modes
0.5t
c(SPC)M
- 1
ns
3
t
w(SPCL)M
Pulse Width Low, SPI0_CLK, All Master Modes
0.5t
c(SPC)M
- 1
ns
Polarity = 0, Phase = 0,
5
to SPI0_CLK rising
Polarity = 0, Phase = 1,
- 0.5t
c(SPC)M
+ 5
Delay, initial data bit valid on
to SPI0_CLK rising
4
t
d(SIMO_SPC)M
SPI0_SIMO after initial edge
ns
Polarity = 1, Phase = 0,
on SPI0_CLK
(2)
5
to SPI0_CLK falling
Polarity = 1, Phase = 1,
- 0.5t
c(SPC)M
+ 5
to SPI0_CLK falling
Polarity = 0, Phase = 0,
5
from SPI0_CLK rising
Polarity = 0, Phase = 1,
5
Delay, subsequent bits valid
from SPI0_CLK falling
5
t
d(SPC_SIMO)M
on SPI0_SIMO after transmit
ns
Polarity = 1, Phase = 0,
edge of SPI0_CLK
5
from SPI0_CLK falling
Polarity = 1, Phase = 1,
5
from SPI0_CLK rising
Polarity = 0, Phase = 0,
0.5t
c(SPC)M
-3
from SPI0_CLK falling
Polarity = 0, Phase = 1,
0.5t
c(SPC)M
-3
Output hold time, SPI0_SIMO
from SPI0_CLK rising
6
t
oh(SPC_SIMO)M
valid after
ns
Polarity = 1, Phase = 0,
receive edge of SPI0_CLK
0.5t
c(SPC)M
-3
from SPI0_CLK rising
Polarity = 1, Phase = 1,
0.5t
c(SPC)M
-3
from SPI0_CLK falling
Polarity = 0, Phase = 0,
0
to SPI0_CLK falling
Polarity = 0, Phase = 1,
0
Input Setup Time, SPI0_SOMI
to SPI0_CLK rising
7
t
su(SOMI_SPC)M
valid before
ns
Polarity = 1, Phase = 0,
receive edge of SPI0_CLK
0
to SPI0_CLK rising
Polarity = 1, Phase = 1,
0
to SPI0_CLK falling
Polarity = 0, Phase = 0,
5
from SPI0_CLK falling
Polarity = 0, Phase = 1,
5
Input Hold Time, SPI0_SOMI
from SPI0_CLK rising
8
t
ih(SPC_SOMI)M
valid after
ns
Polarity = 1, Phase = 0,
receive edge of SPI0_CLK
5
from SPI0_CLK rising
Polarity = 1, Phase = 1,
5
from SPI0_CLK falling
(1)
P = SYSCLK2 period
(2)
First bit may be MSB or LSB depending upon SPI configuration. MO(0) refers to first bit and MO(n) refers to last bit output on
SPI0_SIMO. MI(0) refers to the first bit input and MI(n) refers to the last bit input on SPI0_SOMI.
132
Peripheral Information and Electrical Specifications
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