AM3703CUS datasheet(244/280 Pages) TI

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SWPS038-093

Pulse Duration

90%

50%

10%

AM3715, AM3703

SPRS616F

– JUNE 2010 – REVISED AUGUST 2011

www.ti.com

Table 6-105. UART Switching Characteristics(2) (continued)

SIGNAL NAME

MUX MODE

DESCRIPTION

MIN

MAX

UNIT

UART3 (uart3_tx_irtx): T27

tR, Rise time

1.5

5.5

tF, Fall time

CL, Output load

Universal Asynchronous Receiver/Transmitter (UART4)

UART4 (uart4_tx): K8

tR, Rise time

0.6

2.4

tF, Fall time

CL, Output load

(1) The mode is configured by bits SC0 and SC1 of the IO cell. For more details, see the AM/DM37x Multimedia Device Technical

Reference Manual (literature number SPRUGN4).

(2) Caution: Up to a rise time or a fall time of 1.2 ns, this can create EMI parasitics.

6.6.7.2

UART3 IrDA

The IrDA module can operate in three different modes:

•

Slow infrared (SIR) (

≤ 115.2 Kbits/s)

•

Medium infrared (MIR) (0.576 Mbits/s and 1.152 Mbits/s)

•

Fast infrared (FIR) (4 Mbits/s)

Figure 6-64. UART IrDA Pulse Parameters

6.6.7.2.1 UART3 IrDA

—Receive Mode

Table 6-106. UART3 IrDA Signaling Rate and Pulse Duration

—Receive Mode

SIGNALING RATE

ELECTRICAL PULSE DURATION

UNIT

MIN

TYP

MAX

SIR

2.4 Kbit/s

52.17

78.13

208.33

μs

9.6 Kbit/s

13.10

19.53

52.08

μs

19.2 Kbit/s

6.59

9.77

26.04

μs

38.4 Kbit/s

3.34

4.88

13.02

μs

57.6 Kbit/s

2.25

3.26

8.68

μs

115.2 Kbit/s

1.17

1.63

4.34

μs

MIR

0.576 Mbit/s

300.55

416.67

867.86

244

Timing Requirements and Switching Characteristics

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