CC2430 Datasheet, PDF (205/234 Pages) Texas Instruments – A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee-TM

CC2430
Bit Name
7:5 -
4
PAN_COORDINATOR
3
ADR_DECODE
2:0 CCA_HYST[2:0]
Reset
000
0
1
010
R/W
R/W
R/W
R/W
R/W
Function
Reserved. Always set to 000
PAN Coordinator enable. Used for filtering packets with no
destination address, as specified in section 7.5.6.2 in
802.15.4 [1]
0 : Device is not a PAN Coordinator
1 : Device is a PAN Coordinator
Hardware Address decode enable.
0 : Address decoding is disabled
1 : Address decoding is enabled
CCA Hysteresis in dB, values 0 through 7 dB
Table 46: Register MDMCTRL0H (0xDF02)
Bit Name
Reset R/W Description
7:6
5
4
3:0
CCA_MODE[1:0]
AUTOCRC
AUTOACK
PREAMBLE_LENGTH[3:0]
11
1
0
0010
R/W
R/W
R/W
R/W
Clear Channel Assessment mode select.
00 : Reserved
01 : CCA=1 when RSSI < CCA_THR-CCA_HYST
CCA=0 when RSSI >= CCA_THR
10 : CCA=1 when not receiving a packet
11 : CCA=1 when RSSI < CCA_THR-CCA_HYST and not
receiving a packet
CCA=0 when RSSI >= CCA_THR or receiving a packet
In packet mode a CRC-16 (ITU-T) is calculated and is
transmitted after the last data byte in TX. In RX CRC is
calculated and checked for validity.
If AUTOACK is set, all packets accepted by address
recognition with the acknowledge request flag set and a
valid CRC are ack’ed 12 symbol periods after being
received.
The number of preamble bytes (2 zero-symbols) to be sent
in TX mode prior to the SYNCWORD. The reset value of
0010 is compliant with IEEE 802.15.4, since the 4^th zero
byte is included in the SYNCWORD.
0000 : 1 leading zero bytes (not recommended)
0001 : 2 leading zero bytes (not recommended)
0010 : 3 leading zero bytes (IEEE 802.15.4 compliant)
0011 : 4 leading zero bytes
…
1111 : 16 leading zero bytes
Table 47: Register MDMCTRL0L (0xDF03)
CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A
Page 205 of 232