CC2564MODACMOG datasheet(22/68 Pages) TI2

22 / 68 page

Host

CC2564MODx

Host_RX

Host_TX

HCI_RX

HCI_TX

GND

Host

CC2564MODx

Host_RX

Host_TX

Host_CTS

Host_RTS

HCI_RX

HCI_TX

HCI_CTS

HCI_RTS

CC2564MODN, CC2564MODA

SWRS160E – FEBRUARY 2014 – REVISED JANUARY 2017

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Product Folder Links: CC2564MODN CC2564MODA

Detailed Description

Flow control between the host and the TI Bluetooth HCI module is bytewise by hardware.

Figure 5-4 shows UART Transport Layer.

Figure 5-4. UART Transport Layer

When the UART RX buffer of the TI Bluetooth HCI module passes the flow control threshold, it sets the

HCI_RTS signal high to stop transmission from the host.

When the HCI_CTS signal is set high, the module stops transmission on the interface. If HCI_CTS is set

high while transmitting a byte, the module finishes transmitting the byte and stops the transmission.

The UART Transport Layer includes a mechanism that handles the transition between active mode and

sleep mode. The protocol occurs through the CTS and RTS UART lines and is known as the enhanced

HCI low level (eHCILL) power-management protocol.

For more information on the UART Transport Layer, see Volume 4 Host Controller Interface, Part A UART

Transport Layer of the Bluetooth Core Specifications (www.bluetooth.org).

5.7.2

Three-Wire UART Transport Layer

The 3-wire UART Transport Layer consists of three signals (see Figure 5-5):

•

GND

Figure 5-5. Three-Wire UART Transport Layer

The 3-Wire UART Transport Layer supports the following features:

•

Software flow control (XON/XOFF)

•

Power management using the software messages:

–

WAKEUP

–

WOKEN

–

SLEEP

•

CRC data integrity check

For more information on the 3-Wire UART Transport Layer, see Volume 4 Host Controller Interface, Part

D Three- Wire UART Transport Layer of the Bluetooth Core Specifications (www.bluetooth.org).

CC2564MODACMOG Datasheet(PDF) 22 Page - Texas Instruments

CC2564MODACMOG Datasheet(HTML) 22 Page - Texas Instruments

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