Microchip Technology RF TXRX 433/868/915 TSSOP -16 MRF49XA-I/ST MRF49XA-I/ST Datenbogen
Produktcode
MRF49XA-I/ST
© 2009-2011 Microchip Technology Inc.
Preliminary
DS70590C-page 93
MRF49XA
APPENDIX A: READ SEQUENCE
AND PACKET
STRUCTURES
STRUCTURES
shows the STSREG read sequence with FIFO
read as an example.
FIGURE A-1:
STSREG READ SEQUENCE
Note: 1. Applicable when the RXCEN bit is set using the PMCREG.
2. Applicable when the RXCEN bit is cleared using the PMCREG.
3. These bits are internally latched and the other bits are only multiplexed out.
2. Applicable when the RXCEN bit is cleared using the PMCREG.
3. These bits are internally latched and the other bits are only multiplexed out.
SCK
0
1
3
4
2
5
6
7
8
9
10
11
12
13
14
15
16
17
POR
TXRXFIFO
CLKRL
TXOWR
XOF
WUTI
NT
LCE
XINT
LBTD
FIFO
EM
ATRS
SI
DQDO
OFFSV
AFCCT
(Latched)
OFFSB
<3>
OFFSB
<2>
OFFSB
<1>
OFFSB
<0>
FO
FO+1
FO+2
(Latched) (Latched) (Latched) (Latched)
(Sign)
Command
FIFO Out
Status Bits Out
Interrupt Bits Out
SDI
SDO
CS
(1)(2)(3)
(1,2,3)
(1,2,3)
TABLE A-1:
RECOMMENDED FIFO PACKET STRUCTURES
Length
Preamble
Synchronous Word/Network ID Payload
CRC
Minimum Length
4-8 bits (0x0A or 0x05)
0xD4 (programmable)
—
4-bit-1 byte
Recommended Length 8-12 bits (e.g., 0xAA or 0x55)
0x2DD4 (D4 is programmable)
—
2 bytes