SSIClk
(SPO = 1)
SSITx
(Master)
SSIRx
(Slave)
LSB
SSIClk
(SPO = 0)
S2
S1
SSIFss
LSB
S3
MSB
MSB
26
SWRS158B – FEBRUARY 2015 – REVISED JULY 2016
Product Folder Links:
Specifications
Copyright © 2015–2016, Texas Instruments Incorporated
Figure 5-3. SSI Timing for SPI Frame Format (FRF = 00), With SPH = 1
5.25 DC Characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
T
A
= 25°C, V
DDS
= 1.8 V
GPIO VOH at 8-mA load
IOCURR = 2, high-drive GPIOs only
1.32
1.54
V
GPIO VOL at 8-mA load
IOCURR = 2, high-drive GPIOs only
0.26
0.32
V
GPIO VOH at 4-mA load
IOCURR = 1
1.32
1.58
V
GPIO VOL at 4-mA load
IOCURR = 1
0.21
0.32
V
GPIO pullup current
Input mode, pullup enabled, Vpad = 0 V
71.7
µA
GPIO pulldown current
Input mode, pulldown enabled, Vpad = VDDS
21.1
µA
GPIO high/low input transition,
no hysteresis
IH = 0, transition between reading 0 and reading 1
0.88
V
GPIO low-to-high input transition,
with hysteresis
IH = 1, transition voltage for input read as 0
→
1
1.07
V
GPIO high-to-low input transition,
with hysteresis
IH = 1, transition voltage for input read as 1
→
0
0.74
V
GPIO input hysteresis
IH = 1, difference between 0
→
1 and 1
→
0 points
0.33
V