1
2
3
4
GPIx
GPOx
TMS320C6474
www.ti.com
SPRS552F – OCTOBER 2008 – REVISED JULY 2010
7.19 General Purpose Input/Output (GPIO)
On the C6474 device, the GPIO peripheral pins GP[11:0] are used to latch configuration pins. These pins
are sampled at power-on reset and are functional as GPIO pins the remainder of the time. For more
detailed information on device/peripheral configuration and the C6474 device pin muxing, see
Section 3
,
Device Configuration.
7.19.1 GPIO Peripheral Register Description(s)
Table 7-81. GPIO Registers
HEX ADDRESS
ACRONYM
REGISTER NAME
02B0 0008
BINTEN
GPIO Interrupt per Bank Enable Register
02B0 000C
-
Reserved
02B0 0010
DIR
GPIO Direction Register
02B0 0014
OUT_DATA
GPIO Output Data Register
02B0 0018
SET_DATA
GPIO Set Data Register
02B0 001C
CLR_DATA
GPIO Clear Data Register
02B0 0020
IN_DATA
GPIO Input Data Register
02B0 0024
SET_RIS_TRIG
GPIO Set Rising Edge Interrupt Register
02B0 0028
CLR_RIS_TRIG
GPIO Clear Rising Edge Interrupt Register
02B0 002C
SET_FAL_TRIG
GPIO Set Falling Edge Interrupt Register
02B0 0030
CLR_FAL_TRIG
GPIO Clear Falling Edge Interrupt Register
02B0 008C
-
Reserved
02B0 0090 - 02B0 00FF
-
Reserved
02B0 0100 - 02B0 3FFF
-
Reserved
7.19.2 GPIO Electrical Data/Timing
Table 7-82. Timing Requirements for GPIO Inputs
(1)
(see
Figure 7-44
)
NO.
PARAMETER
MIN
MAX
UNIT
1
t
w(GPIH)
Pulse duration, GPIx high
12C - 3
ns
2
t
w(GPIL)
Pulse duration, GPIx low
12C - 3
ns
(1)
C = 1/CPU CLK frequency, in ns.
Table 7-83. Switching Characteristics Over Recommended Operating Conditions for GPIO Outputs
(1)
(see
Figure 7-44
)
NO.
PARAMETER
MIN
MAX
UNIT
1
t
w(GPOH)
Pulse duration, GPOx high
36C - 8
ns
2
t
w(GPOL)
Pulse duration, GPOx low
36C - 8
ns
(1)
C = 1/CPU CLK frequency, in ns.
Figure 7-44. GPIO Timing
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Peripheral Information and Electrical Specifications
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