WI.232FHSS-25-FCC-R datasheet(52/67 Pages) RADIOMETRIX

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WI.232FHSS-25-R/ WI.232FHSS-250-R DATASHEET

Revision 1.1.0

4.1.40. Exception (regEXCEPTION)

regEXCEPTION (0x79)

The module has a built-in exception engine that can notify the host processor of an unexpected event.

When an exception occurs, the exception code is stored in this register. Reading from this register clears

the exception and, if applicable, returns the EX pin to low. If an exception occurs before the previous

exception code is read, the previous value is overwritten. The following table lists the exception codes and

their values.

Exception

Code

Exception Name

Description

0x08

EX_BUFOVFL

Internal UART buffers overflowed

0x09

EX_RFOVL

Internal RF packet buffer overflowed

0x13

EX_WRITEREGFAILED

Attempted write to register failed

0x20

EX_NOACK

Acknowledgment packet not received after maximum number of retries

0x40

EX_BADCRC

Bad CRC detected on incoming packet

0x42

EX_BADHEADER

Bad CRC detected in packet header

0x43

EX_BADSEQID

Sequence ID was incorrect in ACK packet

0x44

EX_BADFRAMETYPE

Unsupported Frame type specified

Table 22, Exception Codes

4.1.41. Last Good Packet RSSI (regLGPRSSI)

regLGPRSSI (0x7B)

This register holds the receive strength indication, in dBm, of the last successful packet reception. A

successful packet reception is one that causes payload data to be delivered to the UART interface. Each

time a new packet is successfully processed, the value in this register is overwritten. The register value is

an 8-bit signed integer representing the RSSI in dBm. It is accurate to +/-3dB and has +/-2dB linearity. The

values returned take into account the LNA gain.

4.1.42. Immediate RSSI (regIMMEDRSSI)

regIMMEDRSSI (0x7C)

This register returns the current receive signal strength indication, in dBm. When the register is accessed,

the RF interface is queried at that time. The register value is an 8-bit signed integer representing the RSSI

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