Manual

RF22
Version: 0.1 Date: 12/23/2008
Tel: [phone] Fax: [phone] E-mail: [e-mail] http://www.hoperf.com
26
6.4.2. Packet Handler Enabled
When the packet handler is enabled, all the fields of the packet structure need to be configured. If multiple packets are
desired to be stored in the FIFO, then there are options available for the different fields that will be stored into the FIFO.
Figure 19 demonstrates the options and settings available when multiple packets are enabled. Figure 20 demonstrates
the operation of fixed packet length and correct/incorrect packets.
Register
Data
Register
Data
FIFO
Data
Header(s)
Length
rx_multi_pk_en = 1
H
Data
rx_multi_pk_en = 0
txhdlen = 0 txhdlen > 0
fixpklenfixpklen
0
10 1
Data DataData Data
LL
H
RX FIFO Contents:
Transmission:
Figure19. Multiple Packets in RX Packet Handler
Data
L
H
Data
L
H
Data
L
H
Data
L
H
Write
Pointer
Write
Pointer
RX FIFO Addr.
63
0
RX FIFO Addr.
63
0
Data
L
H
Write
Pointer
RX FIFO Addr.
63
0
Data
L
H
Data
L
H
Write
Pointer
RX FIFO Addr.
63
0
CRC
error
Data
L
H
Data
L
H
Write
Pointer
RX FIFO Addr.
63
0
Initial state PK 1 OK
PK 2 OK
PK 3
ERROR
PK 4 OK
Figure20. Multiple Packets in RX with CRC or Header Error
Table13. RX Packet Handler Configuration
Data modes dtmod[1:0] enpacrx Direct Data and CLK IO Preamble & Sync word detection Header Handling Data Storage in FIFO CRC Handling Manchester and Whitening
FIFO_PH 10 1 option set option set option
option
FIFO 10 0 option
set
—
set
—
option
Direct 0X X set
set
— —
Manchester optional for sync-detection