RFM219SW datasheet(31/35 Pages) HOPE

31 / 35 page

RFM219SW

www.hoperf.com

Rev 1.0 | Page 31/35

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Table 23. RSSI

Bit

Bit Name

Descriptions

RSSI

(0x45)

7:0

RSSI_VALUE<7:0>

The value immediately reflects the real time Radio Signal Strength

Indicator (RSSI) when the chip is working in the RX state. The value is

low-pass filtered by the chip before it is read out. Thus any

high-frequency noise in the RSSI cannot be seen by the user. The RSSI

of any signal that is weaker than the “Squelch Threshold” will be

masked, i.e. the RSSI value is read as 0.

Table 24. FUNC_EN

Bit

Bit Name

Descriptions

r/w

RESV

Always set it to 0.

During manufacturing stage, a few steps are required to perform to enter

the test mode. Stopping the running sleep timer is one of those steps

r/w

SLTIMER_STOP

(see Chapter Manufacturing Test for details).

0: Do not disturb the sleep timer (default).

1: Stop the sleep timer.

During manufacturing stage, a few steps are required to perform to enter

the test mode. Setting this bit to 1 is one of those steps (see Chapter

r/w

PROD_TEST_EN

Manufacturing Test for details).

FUNC_EN

(0x46)

0: Disable the manufacturing test mode (default).

1: Enable the manufacturing test mode.

r/w

RESV

Always set it to 0.

r/w

RESV

Always set it to 0.

To minimize the power consumption the maximum SPI clock speed is

400 kHz. The user can used this bit to allow up to 1MHz SPI speed

r/w

HS_SPI_EN

supported.

0: Support maximum SPI clock speed of 400 kHz (default).

1: Support maximum SPI clock speed of 1 MHz.

r/w

RESV

Always set it to 0.

r/w

RESV

Always set it to 0.

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