MRF24XA_15 Datasheet, PDF (18/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
2.7 Register Details
REGISTER 2-1: OPSTATUS (OPERATION STATUS)⁽³⁾
R-0
R/HS/HC-0 R/HS/HC-0 R/HS/HC-0 R/HS/HC-0
r
MACOP<3:0>
bit 7
R/HS/HC-0
Address: 0x02
R/HS/HC-0 R/HS/HC-0
RFOP<2:0>
bit 0
Legend: R = Readable W = Writable bit
bit
-n = Value at POR
‘1’ = Bit is set
r = Reserved
HC = Hardware Clear
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
HS = Hardware Set
x = Bit is unknown
bit 7
bit 6-3
bit 2-0
Reserved: Maintain as ‘0’
MACOP<3:0>: MAC Operation Register bits^{(1, 2)}
Provides status information on the current MAC state machine state. Encoding on MACOP<3:1>:
111 = Transmitting Acknowledge (TXACK)
110 = Receiving a packet (RXBUSY)
101 = Receiver listening to the channel waiting for packet (RX)
100 = Receiving (or waiting for) Acknowledge (RXACK)
011 = Transmitting a packet (TX)
010 = Performing Clear Channel Assessment (CCA)
001 = Back-off before repeated CCA (BO)
000 = MAC does not perform any o ation (IDLE)
RFOP<2:0>: Radio Operation Register bits
Provides status information on the current radio state. Encoding on RFOP<2:0>:
111 = TX with external PA is turned on (TX+PA)
110 = RX with external LNA is turned on (RX+LNA)
101 = Synthesizer and external PA or LNA is turned on (SYNTH+PA/LNA)
100 = Radio calibrates if the host MCU sets the CALST, otherwise, device malfunction occurs (CAL/MAL)
011 = Analog transmit chain is activated (TX)
010 = Analog receiver chain is active (RX). Digital may be partially shut off
001 = Synthesizer is steady or ramping up or channel change is issued (SYNTH)
000 = Only the crystal oscillator is ON (OFF), (except when XTALSF = 1)
Note 1:
2:
3:
GPIO<2:0> is dedicated to output MACOP<3:1> or RFOP<2:0>. Refer to the PINCON register, which
specifies the pin Configuration.
MACOP<0> is connected to the RXBUFFUL register bit. It cannot be output over GPIO’s.
The OPSTATUS register is sent on the SDO pin during the first byte of the SPI operation.
DS70005023C-page 18
Preliminary
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