Datasheet

GP[x]
Input
GP[x]
Output
4
3
2
1
TMS320DM6467T
SPRS605C –JULY 2009–REVISED JUNE 2012 www.ti.com
7.28.3 GPIO Peripheral Input/Output Electrical Data/Timing
Table 7-145. Timing Requirements for GPIO Inputs
(1)
(see Figure 7-94)
-1G
NO. UNIT
MIN MAX
1 t
w(GPIH)
Pulse duration, GP[x] input high 2C
(2)
ns
2 t
w(GPIL)
Pulse duration, GP[x] input low 2C
(2)
ns
(1) The pulse width given is sufficient to generate a CPU interrupt or an EDMA event. However, if a user wants to have DM6467T recognize
the GP[x] input changes through software polling of the GPIO register, the GP[x] input duration must be extended to allow DM6467T
enough time to access the GPIO register through the internal bus.
(2) C = SYSCLK3 period in ns. For example, when running parts at 1 GHz, use C = 4 ns.
Table 7-146. Switching Characteristics Over Recommended Operating Conditions for GPIO Outputs
(see Figure 7-94)
-1G
NO. PARAMETER UNIT
MIN MAX
3 t
w(GPOH)
Pulse duration, GP[x] output high C
(1) (2)
ns
4 t
w(GPOL)
Pulse duration, GP[x] output low C
(1) (2)
ns
(1) This parameter value should not be used as a maximum performance specification. Actual performance of back-to-back accesses of the
GPIO is dependent upon internal bus activity.
(2) C = SYSCLK3 period in ns. For example, when running parts at 1 GHz, use C = 4 ns.
Figure 7-94. GPIO Port Timing
344 Peripheral Information and Electrical Specifications Copyright © 2009–2012, Texas Instruments Incorporated
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