Datasheet

TMS320F28027, TMS320F28026, TMS320F28023, TMS320F28022
TMS320F28021, TMS320F28020, TMS320F280200
www.ti.com SPRS523J –NOVEMBER 2008–REVISED OCTOBER 2013
Table 4-10. GPIOA MUX
(1)(2)
DEFAULT AT RESET
PERIPHERAL PERIPHERAL PERIPHERAL
PRIMARY I/O
SELECTION 1 SELECTION 2 SELECTION 3
FUNCTION
GPAMUX1 REGISTER
(GPAMUX1 BITS = 00) (GPAMUX1 BITS = 01) (GPAMUX1 BITS = 10) (GPAMUX1 BITS = 11)
BITS
1-0 GPIO0 EPWM1A (O) Reserved Reserved
3-2 GPIO1 EPWM1B (O) Reserved COMP1OUT (O)
5-4 GPIO2 EPWM2A (O) Reserved Reserved
7-6 GPIO3 EPWM2B (O) Reserved COMP2OUT
(3)
(O)
9-8 GPIO4 EPWM3A (O) Reserved Reserved
11-10 GPIO5 EPWM3B (O) Reserved ECAP1 (I/O)
13-12 GPIO6 EPWM4A (O) EPWMSYNCI (I) EPWMSYNCO (O)
15-14 GPIO7 EPWM4B (O) SCIRXDA (I) Reserved
17-16 Reserved Reserved Reserved Reserved
19-18 Reserved Reserved Reserved Reserved
21-20 Reserved Reserved Reserved Reserved
23-22 Reserved Reserved Reserved Reserved
25-24 GPIO12 TZ1 (I) SCITXDA (O) Reserved
27-26 Reserved Reserved Reserved Reserved
29-28 Reserved Reserved Reserved Reserved
31-30 Reserved Reserved Reserved Reserved
GPAMUX2 REGISTER
(GPAMUX2 BITS = 00) (GPAMUX2 BITS = 01) (GPAMUX2 BITS = 10) (GPAMUX2 BITS = 11)
BITS
1-0 GPIO16 SPISIMOA (I/O) Reserved TZ2 (I)
3-2 GPIO17 SPISOMIA (I/O) Reserved TZ3 (I)
5-4 GPIO18 SPICLKA (I/O) SCITXDA (O) XCLKOUT (O)
7-6 GPIO19/XCLKIN SPISTEA (I/O) SCIRXDA (I) ECAP1 (I/O)
9-8 Reserved Reserved Reserved Reserved
11-10 Reserved Reserved Reserved Reserved
13-12 Reserved Reserved Reserved Reserved
15-14 Reserved Reserved Reserved Reserved
17-16 Reserved Reserved Reserved Reserved
19-18 Reserved Reserved Reserved Reserved
21-20 Reserved Reserved Reserved Reserved
23-22 Reserved Reserved Reserved Reserved
25-24 GPIO28 SCIRXDA (I) SDAA (I/OD) TZ2 (I)
27-26 GPIO29 SCITXDA (O) SCLA (I/OD) TZ3 (I)
29-28 Reserved Reserved Reserved Reserved
31-30 Reserved Reserved Reserved Reserved
(1) The word reserved means that there is no peripheral assigned to this GPxMUX1/2 register setting. Should it be selected, the state of the
pin will be undefined and the pin may be driven. This selection is a reserved configuration for future expansion.
(2) I = Input, O = Output, OD = Open Drain
(3) These functions are not available in the 38-pin package.
Copyright © 2008–2013, Texas Instruments Incorporated Peripherals 71
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