CN-0164 Datasheet, PDF (4/5 Pages) Analog Devices – Low Power, Long Range, ISM Wireless Measuring Node

CN-0164
INT/LOCK
INTERRUPT FROM ADF7020 TO ADuC7060 IRQ2
9 CLOCK CYCLES
DATA CLK
INTERRUPTS FROM ADF7020 TO ADuC7060 IRQ3
Circuit Note
PACKAGE RECEIVED
DATA I/O
DATA PACKAGE (4 BYTES)
CRC (2 BYTES)
Figure 3. Data I/O Timing
ADF7020 INTERRUPT
Rx
Tx
Rx or Tx?
BIT_CNTR < 7
BIT_CNTR = 0
YES
STORE BYTE
END OF
PACKAGE? _NO
SET PACKAGE
Rx FLAG
CLOCK-IN BIT
FROM ADF7020
INC. BIT_CNTR
BIT_CNTR < 7
YES
BIT_CNTR = 0
CLOCK-OUT BIT
TO ADF7020
INC. BIT_CNTR
ALL BYTES
SENT?
YES
DISABLE INTERRUPT
EXIT INTERRUPT
Figure 4. Interrupt Service Routines for Handling Rx and Tx Data
Rev. A | Page 4 of 5