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TMS570LS0232PZ Datasheet(PDF) 87 Page - Texas Instruments

Part # TMS570LS0232PZ
Description  16- and 32-Bit RISC Flash Microcontroller
PDF  109 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TMS570LS0232PZ Datasheet(HTML) 87 Page - Texas Instruments

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TMS570LS0232
www.ti.com
SPNS242A – OCTOBER 2014 – REVISED JUNE 2015
Table 7-14. SPI Master Mode External Timing Parameters (CLOCK PHASE = 1, SPICLK = output, SPISIMO
= output, and SPISOMI = input)(1)(2)(3)
NO.
PARAMETER
MIN
MAX UNIT
1
tc(SPC)M
Cycle time, SPICLK (4)
40
256tc(VCLK)
ns
Pulse duration, SPICLK high (clock polarity
tw(SPCH)M
0.5tc(SPC)M – tr(SPC)M – 3
0.5tc(SPC)M + 3
= 0)
2(5)
ns
Pulse duration, SPICLK low (clock polarity
tw(SPCL)M
0.5tc(SPC)M – tf(SPC)M – 3
0.5tc(SPC)M + 3
= 1)
Pulse duration, SPICLK low (clock polarity
tw(SPCL)M
0.5tc(SPC)M – tf(SPC)M – 3
0.5tc(SPC)M + 3
= 0)
3(5)
ns
Pulse duration, SPICLK high (clock polarity
tw(SPCH)M
0.5tc(SPC)M – tr(SPC)M – 3
0.5tc(SPC)M + 3
= 1)
Valid time, SPICLK high after SPISIMO
tv(SIMO-SPCH)M
0.5tc(SPC)M – 6
data valid (clock polarity = 0)
4(5)
ns
Valid time, SPICLK low after SPISIMO data
tv(SIMO-SPCL)M
0.5tc(SPC)M – 6
valid (clock polarity = 1)
Valid time, SPISIMO data valid after
tv(SPCH-SIMO)M
0.5tc(SPC)M – tr(SPC) – 4
SPICLK high (clock polarity = 0)
5(5)
ns
Valid time, SPISIMO data valid after
tv(SPCL-SIMO)M
0.5tc(SPC)M – tf(SPC) – 4
SPICLK low (clock polarity = 1)
Setup time, SPISOMI before SPICLK high
tsu(SOMI-SPCH)M
tr(SPC) + 2.2
(clock polarity = 0)
6(5)
ns
Setup time, SPISOMI before SPICLK low
tsu(SOMI-SPCL)M
tf(SPC) + 2.2
(clock polarity = 1)
Valid time, SPISOMI data valid after
tv(SPCH-SOMI)M
10
SPICLK high (clock polarity = 0)
7(5)
ns
Valid time, SPISOMI data valid after
tv(SPCL-SOMI)M
10
SPICLK low (clock polarity = 1)
0.5*tc(SPC)M +
0.5*tc(SPC)M +
CSHOLD = 0
(C2TDELAY+2) * tc(VCLK) -
(C2TDELAY+2) * tc(VCLK) -
Setup time CS active until
tf(SPICS) + tr(SPC) – 7
tf(SPICS) + tr(SPC) + 5.5
SPICLK high (clock polarity
ns
0.5*tc(SPC)M +
0.5*tc(SPC)M +
= 0)
CSHOLD = 1
(C2TDELAY+3) * tc(VCLK) -
(C2TDELAY+3) * tc(VCLK) -
tf(SPICS) + tr(SPC) – 7
tf(SPICS) + tr(SPC) + 5.5
8(6)
tC2TDELAY
0.5*tc(SPC)M +
0.5*tc(SPC)M +
CSHOLD = 0
(C2TDELAY+2) * tc(VCLK) -
(C2TDELAY+2) * tc(VCLK) -
Setup time CS active until
tf(SPICS) + tf(SPC) – 7
tf(SPICS) + tf(SPC) + 5.5
SPICLK low (clock polarity
ns
0.5*tc(SPC)M +
0.5*tc(SPC)M +
= 1)
CSHOLD = 1
(C2TDELAY+3) * tc(VCLK) -
(C2TDELAY+3) * tc(VCLK) -
tf(SPICS) + tf(SPC) – 7
tf(SPICS) + tf(SPC) + 5.5
T2CDELAY*tc(VCLK) +
T2CDELAY*tc(VCLK) +
Hold time SPICLK low until CS inactive
tc(VCLK) - tf(SPC) + tr(SPICS) -
tc(VCLK) - tf(SPC) + tr(SPICS) +
ns
(clock polarity = 0)
7
11
9(6)
tT2CDELAY
T2CDELAY*tc(VCLK) +
T2CDELAY*tc(VCLK) +
Hold time SPICLK high until CS inactive
tc(VCLK) - tr(SPC) + tr(SPICS) -
tc(VCLK) - tr(SPC) + tr(SPICS) +
ns
(clock polarity = 1)
7
11
(C2TDELAY+1)* tc(VCLK) -
10
tSPIENA
SPIENAn Sample Point
(C2TDELAY+1)*tc(VCLK)
ns
tf(SPICS) – 29
11
tSPIENAW
SPIENAn Sample point from write to buffer
(C2TDELAY+2)*tc(VCLK)
ns
(1)
The MASTER bit (SPIGCR1.0) is set and the CLOCK PHASE bit (SPIFMTx.16) is set.
(2)
tc(VCLK) = interface clock cycle time = 1 / f(VCLK)
(3)
For rise and fall timings, see the Table 5-6.
(4)
When the SPI is in Master mode, the following must be true:
For PS values from 1 to 255: tc(SPC)M ≥ (PS +1)tc(VCLK) ≥ 40 ns, where PS is the prescale value set in the SPIFMTx.[15:8] register bits.
For PS values of 0: tc(SPC)M = 2tc(VCLK) ≥ 40 ns.
The external load on the SPICLK pin must be less than 60 pF.
(5)
The active edge of the SPICLK signal referenced is controlled by the CLOCK POLARITY bit (SPIFMTx.17).
(6)
C2TDELAY and T2CDELAY is programmed in the SPIDELAY register
Copyright © 2014–2015, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications
87
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