AMIS-52150 Datasheet, PDF(12/21 Page) AMI SEMICONDUCTOR – Low-Power Transceiver with Clock and Data Recovery

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AMIS-52150 Datasheet, PDF (12/21 Pages) AMI SEMICONDUCTOR – Low-Power Transceiver with Clock and Data Recovery

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AMISâ52150

returns to the low power or âsleepâ state. Sniff Mode

operation is programmable; the âsleepâ time as well as

multiple delay sequences can be fully programmed.

Table 19 lists the Sniff Mode control registers.

Typical timing waveforms for operation in Sniff Mode are

shown in Figure 8 and Figure 9.

Table 19. SNIFF FUNCTION CONTROL REGISTERS

0x0b

Control Registers Associated with the Sniff Function

Name

Bits

States

Comments

SNIFF Threshold

All

Reference Level for Detected RF

0x0c

0x0d

0x13

0x16

0x18

0x19

0x1a

0x1b

Wake on RSSI

SNIFF TIMER RES

DATA FILTER

All

IRQ DELAY

All

RSSI DELAY

All

SNIFF TIMER

All

OFFSET DWELL

All

DATA FILTER PRE-DIVIDER

All

Do Not Wake on RSSI

Wake on RSSI > Threshold

Resolution is Set to 0.5 mS per Step

Resolution is Set to 64 mS per Step

Delay from RX Wakeup to Data Sampled

Time I2C and TX/RX are Active to Indicate a Wakeup

Delay from Wakeup to RSSI Being Checked

Time that Receiver is Off in Sniff Mode

Time Allowing Receiver to Power Up (Typically > 40 mS)

Delay from Data Detection to Pre-clock Output

Figure 8. Receiver Data Acquisition in Sniff Mode

Figure 9. Sniff Timing at RF Energy Detection

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