CC2420 Datasheet, PDF (71/92 Pages) List of Unclassifed Manufacturers – 2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver

CC2420
SECCTRL1 (0x1A) - Security Control Register
Bit
15
14:8
Field Name
-
SEC_TXL
7
-
6:0
SEC_RXL
Reset
0
0
0
0
R/W
W0
R/W
W0
R/W
Description
Reserved, write as 0
Multi-purpose length byte for TX in-line security operations:
CTR : Number of cleartext bytes between length byte and the
first byte to be encrypted
CBC/MAC : Number of cleartext bytes between length byte and
the first byte to be authenticated
CCM : l(a), defining the number of bytes to be authenticated but
not encrypted
Stand-alone : SEC_TXL has no effect
Reserved, write as 0
Multi-purpose length byte for RX in-line security operations:
CTR : Number of cleartext bytes between length byte and the
first byte to be decrypted
CBC/MAC : Number of cleartext bytes between length byte and
the first byte to be authenticated
CCM : l(a), defining the number of bytes to be authenticated but
not decrypted
Stand-alone : SEC_RXL has no effect
BATTMON (0x1B) – Battery Monitor Control register
Bit
15:7
6
Field Name
-
BATTMON_OK
5
BATTMON_EN
4:0
BATTMON_VOLTAGE
[4:0]
Reset
0
1
0
0
R/W
W0
R
R/W
R/W
Description
Reserved, write as 0
Battery monitor comparator output, read only. BATT_OK is valid
5 us after BATTMON_EN has been asserted and
BATTMON_VOLTAGE has been programmed.
0 : Power supply < Toggle Voltage
1 : Power supply > Toggle Voltage
Battery monitor enable
0 : Battery monitor is disabled
1 : Battery monitor is enabled
Battery monitor toggle voltage. The toggle voltage is given by:
V ^{= 1.25 V ⋅ 72 − BATTMON_VOLTAGE}
toggle
27
SWRS041B
Page 71 of 89