CC2420Z-RTR1 datasheet(71/92 Pages) TI

71 / 92 page

CC2420

SWRS041B

Page 71 of 89

SECCTRL1 (0x1A) - Security Control Register

Bit

Field Name

Reset

R/W

Description

Reserved, write as 0

14:8

SEC_TXL

R/W

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

6:0

SEC_RXL

R/W

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

Field Name

Reset

R/W

Description

15:7

Reserved, write as 0

BATTMON_OK

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

BATTMON_EN

R/W

Battery monitor enable

0 : Battery monitor is disabled

1 : Battery monitor is enabled

4:0

BATTMON_VOLTAGE

[4:0]

R/W

Battery monitor toggle voltage. The toggle voltage is given by:

toggle

LTAGE

BATTMON_VO

−

⋅

CC2420Z-RTR1 Datasheet(PDF) 71 Page - Texas Instruments

CC2420Z-RTR1 Datasheet(HTML) 71 Page - Texas Instruments

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