I 2 C Slave Requirements And Characteristics; Spi Master Characteristics - Texas Instruments TPS65981 Manual

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2
I C Slave Requirements and Characteristics (continued)
Recommended operating conditions; T
PARAMETER
2
TLOW I C clock low time
2
TSUDAT
I C serial data setup time
2
THDDAT
I C serial data hold time
2
TVDDAT I C valid data time
2
TVDACK I C valid data time of ACK condition
2
TOCF I C output fall time
2
TBUF
I C bus free time between stop and start
2
TSTS
I C start or repeated start-condition setup time
2
TSTH I C start or repeated start-condition hold time
2
TSPS
I C stop condition setup time
SDA AND SCL FAST MODE CHARACTERISTICS
2
FSCL
I C clock frequency
2
THIGH
I C clock high time
2
TLOW
I C clock low time
2
TSUDAT
I C serial data setup time
2
THDDAT
I C serial data hold time
2
TVDDAT
I C valid data time
2
TVDACK
I C valid data time of ACK condition
2
TOCF
I C output fall time
2
TBUF
I C bus free time between stop and start
2
TSTS I C start or repeated start-condition setup time
2
TSTH
I C start or repeated start-condition hold time
2
TSPS
I C stop condition setup time

7.21 SPI Master Characteristics

Recommended operating conditions; T
PARAMETER
FSPI Frequency of SPI_CLK
TPER Period of SPI_CLK (1/F_SPI)
TWHI SPI_CLK high width
TWLO SPI_CLK low width
TDACT SPI_SZZ falling to SPI_CLK rising delay time
TDINACT SPI_CLK falling to SPI_SSZ rising delay time
TDMOSI SPI_CLK falling to SPI_MOSI Valid delay time
TSUMISO SPI_MISO valid to SPI_CLK falling setup time
THDMSIO SPI_CLK falling to SPI_MISO invalid hold time
TRSPI SPI_SSZ/CLK/MOSI rise time
TFSPI SPI_SSZ/CLK/MOSI fall time
Copyright © 2016, Texas Instruments Incorporated
= –40°C to +105°C unless otherwise noted
A
SCL low to SDA output valid
ACK signal from SCL low to SDA
(out) low
10-pF to 400-pF bus
SCL low to SDA output valid
ACK signal from SCL low to SDA
(out) low
10-pF to 400-pF bus, VDD = 3.3 V
10-pF to 400-pF bus, VDD = 1.8 V
= –40°C to +105°C unless otherwise noted
A
10% to 90%, C
LDO_3V3 = 3.3 V
90% to 10%, C
LDO_3V3 = 3.3 V
Product Folder Links:
SLVSDC2B – FEBRUARY 2016 – REVISED AUGUST 2016
TEST CONDITIONS
TEST CONDITIONS
= 5 pF to 50 pF,
L
= 5 pF to 50 pF,
L
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TPS65981
TPS65981
MIN TYP MAX UNIT
4.7 μs
250 ns
0 ns
3.4 μs
3.4 μs
250 ns
4.7 μs
4.7
μs
4 μs
4 μs
0 400 kHz
0.6
μs
1.3 μs
100 ns
0 ns
0.9 μs
0.9 μs
12 250
ns
6.5 250
1.3
μs
0.6 μs
0.6 μs
0.6
μs
MIN TYP MAX UNIT
11.82 12 12.18 MHz
82.1 83.33 84.6 ns
30 ns
30 ns
30 50 ns
160 180 ns
–5 5 ns
21 ns
0 ns
0.1 8 ns
0.1 8 ns
21