Datasheet

TMS320LF2407A, TMS320LF2406A, TMS320LF2403A, TMS320LF2402A
TMS320LC2406A, TMS320LC2404A, TMS320LC2403A, TMS320LC2402A
DSP CONTROLLERS
SPRS145L − JULY 2000 − REVISED SEPTEMBER 2007
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
• 93
SPI master mode external timing parameters (clock phase = 1)
†‡
(see Figure 43)
NO.
SPI WHEN (SPIBRR + 1) IS EVEN
OR SPIBRR = 0 OR 2
SPI WHEN (SPIBRR + 1)
IS ODD AND SPIBRR > 3
UNIT
NO
.
MIN MAX MIN MAX
UNIT
1 t
c(SPC)M
Cycle time, SPICLK 4t
c(CO)
128t
c(CO)
5t
c(CO)
127t
c(CO)
ns
2
§
t
w(SPCH)M
Pulse duration, SPICLK high
(clock polarity = 0)
0.5t
c(SPC)M
−10 0.5t
c(SPC)M
0.5t
c(SPC)M
−0.5t
c(CO)
−10 0.5t
c(SPC)M
−0.5t
c(CO)
ns
2
§
t
w(SPCL)M
Pulse duration, SPICLK low
(clock polarity = 1)
0.5t
c(SPC)M
−10 0.5t
c(SPC)M
0.5t
c(SPC)M
−0.5t
c(CO)
−10 0.5t
c(SPC)M
−0.5t
c(CO)
ns
3
§
t
w(SPCL)M
Pulse duration, SPICLK low
(clock polarity = 0)
0.5t
c(SPC)M
−10 0.5t
c(SPC)M
0.5t
c(SPC)M
+0.5t
c(CO)
−10 0.5t
c(SPC)M
+ 0.5t
c(CO)
ns
3
§
t
w(SPCH)M
Pulse duration, SPICLK high
(clock polarity = 1)
0.5t
c(SPC)M
−10 0.5t
c(SPC)M
0.5t
c(SPC)M
+0.5t
c(CO)
−10 0.5t
c(SPC)M
+ 0.5t
c(CO)
ns
6
§
t
su(SIMO-SPCH)M
Setup time, SPISIMO data
valid before SPICLK high
(clock polarity = 0)
0.5t
c(SPC)M
−10 0.5t
c(SPC)M
−10
ns
6
§
t
su(SIMO-SPCL)M
Setup time, SPISIMO data
valid before SPICLK low
(clock polarity = 1)
0.5t
c(SPC)M
−10 0.5t
c(SPC)M
−10
ns
7
§
t
v(SPCH-SIMO)M
Valid time, SPISIMO data
valid after SPICLK high
(clock polarity =0)
0.5t
c(SPC)M
−10 0.5t
c(SPC)M
−10
ns
7
§
t
v(SPCL-SIMO)M
Valid time, SPISIMO data
valid after SPICLK low
(clock polarity =1)
0.5t
c(SPC)M
−10 0.5t
c(SPC)M
−10
ns
10
§
t
su(SOMI-SPCH)M
Setup time, SPISOMI before
SPICLK high
(clock polarity = 0)
0 0
ns
10
§
t
su(SOMI-SPCL)M
Setup time, SPISOMI before
SPICLK low
(clock polarity = 1)
0 0
ns
11
§
t
v(SPCH-SOMI)M
Valid time, SPISOMI data
valid after SPICLK high
(clock polarity = 0)
0.25t
c(SPC)M
−10 0.5t
c(SPC)M
−10
ns
11
§
t
v(SPCL-SOMI)M
Valid time, SPISOMI data
valid after SPICLK low
(clock polarity = 1)
0.25t
c(SPC)M
−10 0.5t
c(SPC)M
−10
ns
†
The MASTER/ SLAVE bit (SPICTL.2) is set and the CLOCK PHASE bit (SPICTL.3) is set.
‡
t
c
= system clock cycle time = 1/CLKOUT = t
c(CO)
§
The active edge of the SPICLK signal referenced is controlled by the CLOCK POLARITY bit (SPICCR.6).