MRF24XA_15 Datasheet, PDF (23/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
REGISTER 2-6: PIR4 (PERIPHERAL INTERRUPT REGISTER 4)⁽¹⁾
ADDRESS: 0x07
R/W/HS/HC-0 R/W/HS/HC-0 R/W/HS/HC-0 R/W/HS/HC-0 R/W/HS/HC-0 R/W/HS/HC-0 R/W/HS/HC-0 R/W/HS/HC-0
TXSFDIF
bit 7
RXSFDIF
ERRORIF
WARNIF
EDCCAIF
GPIO2IF
GPIO1IF
GPIO0IF
bit 0
Legend: R = Readable bit W = Writable bit
-n = Value at POR
‘1’ = Bit is set
r = Reserved
HC = Hardware Clear
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
HS = Hardware Set
bit 7
TXSFDIF: Transmit SFD Sent Interrupt Flag bit
Set by the device when the last sample of the SFD field is sent into the air.
Nonpersistent, cleared by SPI read
bit 6
RXSFDIF: Receive SFD Detected Interrupt Flag bit
Set by the device when the SFD field of the received frame is detected.
Nonpersistent, cleared by SPI read.
bit 5
ERRORIF: General Error Interrupt Flag bit
Set by the device, when malfunction state is reached.
bit 4
WARNIF: Warning Interrupt Flag bit
Set by the device when one of the following occurred:
• Battery voltage drops below the threshold by BATMON<4:0> at 0x3F
• Indicates that resistor is missing or improperly connected.
bit 3
EDCCAIF: Energy Detect/CCA Done Interrupt Flag bit
Set by the device when Energy-detect or CCA measurement is complete (following that the host MCU
sets the EDST/CCAST bit to start the measurement and the device is clearing it for completion).
Nonpersistent. Cleared by SPI read.
bit 2
GPIO2IF: GPIO2 Interrupt Flag bit
Set by the device if the GPIOMODE register is set to normal operation, the GPIO is enabled and
configured to input and the level matches with the polarity.
bit 1
GPIO1IF: GPIO1 Interrupt Flag bit
Set by the device if the GPIOMODE register is set to normal operation, the GPIO is enabled and
configured to input and the level matches with the polarity.
bit 0
GPIO0IF: GPIO0 Interrupt Flag bit
Set by the device if the GPIOMODE register is set to normal operation, the GPIO is enabled and
configured to input and the level matches with the polarity.
Note 1: CFOMEAS<7:0> indication becomes valid on SFD found.
 2015 Microchip Technology Inc.
Preliminary
DS70005023C-page 23