Datasheet

GPIO
t
f(GPO)
t
r(GPO)
71
TMS320F28379S , TMS320F28377S
TMS320F28376S, TMS320F28375S, TMS320F28374S
www.ti.com SPRS881C –AUGUST 2014–REVISED MAY 2016
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Product Folder Links: TMS320F28379S TMS320F28377S TMS320F28376S TMS320F28375S TMS320F28374S
SpecificationsCopyright © 2014–2016, Texas Instruments Incorporated
(1) Rise time and fall time vary with load. These values assume a 40-pF load.
5.7.6 GPIO Electrical Data and Timing
The peripheral signals are multiplexed with general-purpose input/output (GPIO) signals. On reset, GPIO
pins are configured as inputs. For specific inputs, the user can also select the number of input qualification
cycles to filter unwanted noise glitches.
The GPIO module contains an Output X-BAR which allows an assortment of internal signals to be routed
to a GPIO in the GPIO mux positions denoted as OUTPUTXBARx. The GPIO module also contains an
Input X-BAR which is used to route signals from any GPIO input to different IP blocks such as the ADC(s),
eCAP(s), ePWM(s), and external interrupts. For more details, see the X-BAR chapter in the
TMS320F2837xS Delfino Microcontrollers Technical Reference Manual.
5.7.6.1 GPIO - Output Timing
Table 5-25 shows the general-purpose output switching characteristics. Figure 5-12 shows the general-
purpose output timing.
Table 5-25. General-Purpose Output Switching Characteristics
over recommended operating conditions (unless otherwise noted)
PARAMETER MIN MAX UNIT
t
r(GPO)
Rise time, GPIO switching low to high All GPIOs 8
(1)
ns
t
f(GPO)
Fall time, GPIO switching high to low All GPIOs 8
(1)
ns
t
fGPO
Toggling frequency, GPO pins 25 MHz
Figure 5-12. General-Purpose Output Timing