RF96 datasheet(29/121 Pages) HOPE

29 / 121 page

Page 29

RF96/97/98

Tel: +86-755-82973805

Fax: +86-755-82973550

E-mail: sales@hoperf.com http://www.hoperf.com

WIRELESS & SENSING

PRELIMINARY

DATASHEET

4.1.2. LoRa

TM Digital Interface

The LoRaTM modem comprises three types of digital interface, static configuration registers, status registers and a FIFO

data buffer. All are accessed through the RF96/97/98

‟s SPI interface - full details of each type of register are given below.

Full listings of the register addresses used for SPI access are given in Section 6.4.

4.1.2.1. LoRa

TM Configuration Registers

Configuration registers are accessed through the SPI interface. Registers are readable in all device mode including Sleep.

However, they should be written only in Sleep and Stand-by modes. Please note that the automatic top level

sequencer (TLS modes) are not available in LoRaTM mode

and the configuration register mapping changes as

shown in Table

85. The content of the LoRaTM configuration registers is retained in FSK/OOK mode. For the functionality of

mode registers common to both FSK/OOK and LoRaTM mode, please consult the Analog and RF Front End section of this

document (Section 5).

4.1.2.2. Status Registers

Status registers provide status information during receiver operation.

4.1.2.3. LoRa

TM Mode FIFO Data Buffer

Overview

The RF96/97/98 is equipped with a 256 byte RAM data buffer which is uniquely accessible in LoRa mode. This RAM

area, thereafter reffered to as the FIFO Data buffer, is fully customizable by the user and allows access to the received, or

to be transmitted, data. All access to the LoRaTM FIFO data buffer is done via the SPI interface. A diagram of the user

defined memory mapping of the FIFO data buffer is shown below. These FIFO data buffer can be read in all operating

modes except sleep and store data related to the last receive operation performed. It is automatically cleared of old content

upon each new transition to receive mode.

Figure 7. LoRa

TM data buffer

RF96 데이터시트(PDF) 29 Page - HOPE Microelectronics CO., Ltd.