AM1802 datasheet(164/180 Pages) TI1

164 / 180 page

GP [ ]

asinput

n m

GPn m

[ ]

asoutput

GP [ ]

asinput

n m

AM1802

SPRS710C – NOVEMBER 2010 – REVISED MARCH 2012

www.ti.com

5.23.2

GPIO Peripheral Input/Output Electrical Data/Timing

Table 5-92. Timing Requirements for GPIO Inputs(1) (see Figure 5-53)

1.2V, 1.1V, 1.0V

NO.

UNIT

MIN

MAX

tw(GPIH)

Pulse duration, GPn[m] as input high

2C(1) (2)

tw(GPIL)

Pulse duration, GPn[m] as input low

2C(1) (2)

(1)

The pulse width given is sufficient to generate a CPU interrupt or an EDMA event. However, if a user wants to have the device

recognize the GPIx changes through software polling of the GPIO register, the GPIx duration must be extended to allow the device

enough time to access the GPIO register through the internal bus.

(2)

C=SYSCLK4 period in ns.

Table 5-93. Switching Characteristics Over Recommended Operating Conditions for GPIO Outputs

(see Figure 5-53)

1.2V, 1.1V, 1.0V

NO.

PARAMETER

UNIT

MIN

MAX

tw(GPOH)

Pulse duration, GPn[m] as output high

2C(1) (2)

tw(GPOL)

Pulse duration, GPn[m] as output low

2C(1) (2)

(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=SYSCLK4 period in ns.

Figure 5-53. GPIO Port Timing

5.23.3

GPIO Peripheral External Interrupts Electrical Data/Timing

Table 5-94. Timing Requirements for External Interrupts(1) (see Figure 5-54)

1.2V, 1.1V, 1.0V

NO.

PARAMETER

UNIT

MIN

MAX

tw(ILOW)

Width of the external interrupt pulse low

2C(1) (2)

tw(IHIGH)

Width of the external interrupt pulse high

2C(1) (2)

(1)

The pulse width given is sufficient to generate an interrupt or an EDMA event. However, if a user wants to have the device recognize the

GPIO changes through software polling of the GPIO register, the GPIO duration must be extended to allow the device enough time to

access the GPIO register through the internal bus.

(2)

C=SYSCLK4 period in ns.

Figure 5-54. GPIO External Interrupt Timing

164

Peripheral Information and Electrical Specifications

Submit Documentation Feedback

Product Folder Link(s): AM1802

AM1802 Datasheet(PDF) 164 Page - Texas Instruments

AM1802 Datasheet(HTML) 164 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL