EM77950
BB Controller
Bit 1: SEARCH_EN
Preamble search enable bit.
When 1: Enables the search for Preamble in receive mode.
When 0: Disables the search for Preamble in receive mode, (used when user
configures the system while in default receive mode).
This bit’s default value is ‘0’. It must be set to ‘1’ in order to start receiving a
packet.
Bit 2: RX_FIFO_RESET
This bit resets the RX_FIFO address pointers when set to Logic 1. This bit is
set by MCU and is cleared automatically by BB.
Bit 3: TX_FIFO_RESET
This bit resets the TX_FIFO address pointers when set to Logic 1. This bit is
set by MCU and is cleared automatically by BB.
Bit 4: STOP_RX
This bit stops receiving the current command, resets the RX_FIFO counters
and start new searches for preamble. This bit is set by MCU and is cleared
automatically by BB.
Bits 5-7: PRE_MASK [0:2]
These bits determine the mask on PRE-H in preamble correlation. Meaning, it
determines the size of the Preamble in the receiver.
The PRE-L is always used in the Preamble correlation.
BB cuts off bit from PRE-H register, starting from the MSB.
PRE
PRE
PRE
Preamble Size
MASK 0
MASK 1
MASK 2
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
16
15
14
13
12
11
10
9
Default Value: 0x60
56 •
Product Specification (V1.0) 10.09.2007
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
