DR-TRC105-450-EV【PDF 18/67 页】BOARD EVALUATION 450MHZ RFM RFIC

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transmit mode the two interrupt signals are IRQ0 and IRQ1. IRQ1 is mapped to IRQCFG0D_FIFOFULL[2] signal

indicating that the transmission FIFO is full when IRQCFG0D_TX_IRQ1[3] is set to 0, or to IRQCFG0E_TX_

STOP[5] when IRQCFG0D_ TX_IRQ1[3] is set to 1. IRQ0 is mapped to the IRQCFG0D_nFIFOEMPY[1] signal.

This signal indicates the transmitter FIFO is empty and must be refilled with data to continue transmission.

3.7 IRQ0 and IRQ1 Mapping

Two TRC105 outputs are dedicated to host microcontroller interrupts or signaling. The interrupts are IRQ0 and

IRQ1 and each have selectable sources. Tables 10, 11, 12 and 13 below summarize the interrupt mapping op-

tions. These interrupts are especially useful in Continuous or Buffered data mode operation.

IRQCFG0D_RX_IRQ0

00

01

10

11

00

01

10

11

00

01

10

Data Mode

Continuous

Continuous

Continuous

Continuous

Buffered

Buffered

Buffered

Buffered

Packet

Packet

Packet

IRQ0

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

IRQ0 Interrupt Source

Start Pattern Detect

RSSI_IRQ

Start Pattern Detect

Start Pattern Detect

None (set to 0)

Write_byte

nFIFOEMPY

Start Pattern Detect

Data_Rdy

Write_byte

nFIFOEMPY

Node Address Match if

11

Packet

Output

ADDRS_cmp is enabled

Start Pattern Detect if

ADDRS_cmp is disabled

Table 10

IRQCFG0D_RX_IRQ1

00

01

10

11

00

01

10

11

00

01

10

11

Data Mode

Continuous

Continuous

Continuous

Continuous

Buffered

Buffered

Buffered

Buffered

Packet

Packet

Packet

Packet

IRQ1

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

Output

IRQ1 Interrupt Source

DCLK

DCLK

DCLK

DCLK

None (set to 0)

FIFOFULL

RSSI_IRQ

FIFO_Int_Rx

CRC_OK

FIFOFULL

RSSI_IRQ

FIFO_Int_Rx

Table 11

Tables 12 and 13 describe the interrupts available in transmit mode:

IRQCFG0D_TX_IRQ0

0

1

0

1

0

1

Data Mode

Continuous

Continuous

Buffered

Buffered

Packet

Packet

IRQ0

Output

Output

Output

Output

Output

Output

IRQ0 Interrupt Source

None (set to 0)

None (set to 0)

FIFO_thresh

nFIFOEMPY

FIFO_thresh

nFIFOEMPY

www.RFM.com E-mail: info@rfm.com

? 2009-2013 by RF Monolithics, Inc.

Technical support +1.800.704.6079

Page 18 of 67

TRC105 - 05/29/13

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