RK-WI.232FHSS-250-FCC-R datasheet(38/67 Pages) RADIOMETRIX

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

Revision 1.1.0

4.1.6. Transmit Wait Timeout (regTXTO)

regNVTXTO (0x05)

regTXTO (0x50)

R/W

Default Transmit Wait Timeout: 16 (15-16ms)

When a byte is received by the UART, the module will reset the UART Tx timeout millisecond timer to

regTXTO Underline and blue.. If the timer expires before another byte is received by the UART, the data is

queued for transmission. Normally, this value should be set to a value greater than one byte time at the

current UART data rate (rounding up) with a minimum of 0x02. regTXTO should never be set to a value of

0x01 or any value less than one byte time; unpredictable results will occur. If the timeout value is set to

0x00, the transmit wait timeout will be disabled, and a minimum of regUARTMTU bytes will be required for

transmission.

This register works in conjunction with the regUARTMTU register to determine when the module sends a

packet. A pseudo-code logical arrangement is:

if (UART_incoming_buffer_size >= regUARTMTU) or (UART_last_char_received_timer >

regTXTO) then SendPacket()

Wi.232FHSS-25-R / Wi.232FHSS-250-R

Baud Rate

Minimum TXTO

2400

6ms

9600

3ms

19200

2ms

38400

2ms

57600

2ms

115200

2ms

Table 14, Minimum TXTO Values

4.1.7. Maximum Transmit Retries (regMAXTXRETRY)

regNVMAXTXRETRY (0x07)

regMAXTXRETRY (0x52)

R/W

Default Maximum Transmit Retries: 26

Sets the number of transmission tries if an acknowledgement is not received. If an acknowledgement is

not received, EX_NORFACK is raised.

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