MRF39RA Datasheet, PDF (53/72 Pages) Microchip Technology – Low-Power, Integrated UHF Receiver

MRF39RA
TABLE 5-5: PACKET ENGINE REGISTERS (CONTINUED)
Name
(Address)
Bits
Variable Name
Mode
Default
Value
Description
RegAutoModes
(0x3B)
7-5 EnterCondition
rw
000 Interrupt condition for entering the Intermediate
mode:
000  None (AutoModes OFF)
001  Rising edge of FifoNotEmpty
010  Rising edge of FifoLevel
011  Rising edge of CrcOk
100  Rising edge of PayloadReady
101  Rising edge of SyncAddress
110  Reserved
111  Falling edge of FifoNotEmpty (i.e., FIFO
empty)
4-2 ExitCondition
rw
000 Interrupt condition for exiting the Intermediate
mode:
000  None (AutoModes OFF)
001  Falling edge of FifoNotEmpty (i.e., FIFO
empty)
010  Rising edge of FifoLevel or Timeout
011  Rising edge of CrcOk or Timeout
100  Rising edge of PayloadReady or Timeout
101  Rising edge of SyncAddress or Timeout
110  Reserved
111  Rising edge of Timeout
1-0 IntermediateMode
rw
00 Intermediate mode:
00  Sleep mode (SLEEP)
01  Standby mode (STDBY)
10  Receiver mode (RX)
11  Reserved
RegFifoThresh
(0x3C)
7—
6-0 FifoThreshold
rw
1*
Unused
rw 0001111 Used to trigger FifoLevel interrupt.
RegPacketConfig2 7-4 InterPacketRxDelay rw
(0x3D)
0000
After PayloadReady occurred, defines the delay
between FIFO empty and the start of a new RSSI
phase for next packet. Must match the
transmitter’s PA ramp-down time.
- Tdelay = 0 if InterpacketRxDelay >= 12
- Tdelay = (2^{InterpacketRxDelay})/BitRate otherwise
3—
rw
0
Unused
2 RestartRx
w
0
Forces the receiver in Wait mode, in Continuous
Rx mode.
Always reads ‘0’.
1 AutoRxRestartOn
rw
1
Enables automatic Rx restart (RSSI phase) after
PayloadReady occurred and packet is completely
read from FIFO:
0  OFF. RestartRx can be used.
1  ON. Rx auto. restart after
InterPacketRxDelay.
0 AesOn
rw
0
Enable the AES decryption:
0  OFF
1  ON (payload limited to 66 bytes maximum)
RegAesKey1
(0x3E)
7-0 AesKey(127:120)
w
0x00 First byte of cipher key (MSB byte)
RegAesKey2
(0x3F)
7-0 AesKey(119:112)
w
0x00 Second byte of cipher key
RegAesKey3
(0x40)
7-0 AesKey(111:104)
w
0x00 Third byte of cipher key
 2015 Microchip Technology Inc.
DS40001778B-page 53