CC3100_15 datasheet(24/44 Pages) TI

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HOST MCU

UART

RTS

CTS

H_IRQ

CC3100 SL

UART

RTS

CTS

H_IRQ

SWAS031-090

HOST MCU

UART

RTS

CTS

H_IRQ

CC3100 SL

UART

RTS

CTS

H_IRQ

SWAS031-089

HOST MCU

UART

RTS

CTS

HOST_INTR(IRQ)

CC3100 SL

UART

RTS

CTS

HOST_INTR(IRQ)

SWAS031-088

CC3100

SWAS031D – JUNE 2013 – REVISED FEBRUARY 2015

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4.13.1 5-Wire UART Topology

Figure 4-17 shows the typical 5-wire UART topology comprised of 4 standard UART lines plus one IRQ

line from the device to the host controller to allow efficient low power mode.

Figure 4-17. Typical 5-Wire UART Topology

This is the typical and recommended UART topology because it offers the maximum communication

reliability and flexibility between the host and the SimpleLink device.

4.13.2 4-Wire UART Topology

The 4-wire UART topology eliminates the host IRQ line (see Figure 4-18). Using this topology requires

one of the following conditions to be met:

•

Host is always awake or active.

•

Host goes to sleep but the UART module has receiver start-edge detection for auto wakeup and does

not lose data.

Figure 4-18. 4-Wire UART Configuration

4.13.3 3-Wire UART Topology

The 3-wire UART topology requires only the following lines (see Figure 4-19):

•

CTS

Figure 4-19. 3-Wire UART Topology

Using this topology requires one of the following conditions to be met:

•

Host always stays awake or active.

Specifications

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