AT86RF211DB-868LT Atmel, AT86RF211DB-868LT Datasheet - Page 14

• Manufacturer Part Number: AT86RF211DB-868LT
• Description: BOARD DAUGHTER AT86RF211/868MHZ
• Manufacturer: Atmel

Specifications of AT86RF211DB-868LT

• Module/board Type: Daughter Board
• For Use With/related Products: AT86RF211 @ 866MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: AT86RF211-DB868107; AT86RF211DB868107; AT86RF211DB868107; AT86RF211DB868LT

Group Addressing (no Data
Field)
14
AT86RF211 (TRX01)
- WUC: WUE = '1', DATA = '0', STOP = '0', DATL = '00000', ADD = '1', MSGTST = '0',
WPER = '0 0110 0011', WL1 = '000 0001', WL2 = '010', ISTU = '1' so WUC = '1000 0000
1000 1100 0110 0000 0101 0100'
The message to wake-up the device at address '01' is then: '10 1010 0001'(Header) +
'010'(Address)
Each device has got its own address, but they are structured to make it possible to
wake-up a whole group or sub-groups in one shot.
Principle: the address is structured as follow (common part = LSB & individual part =
MSB), and the selection of devices to be woken up is made by choosing the length of
significant Address field (ADDL value of register WUA).
For instance, to wake-up a whole group, ADDL (of WUA) will be chosen equal to group
address length (so the other bits will be ignored). Once a group is woken-up, each
device is reprogrammed to be again in wake-up mode but with individual addressing.
Example: same configuration as before except:
message duration = 1.8 ms [ (10+7+1) bits x 100 µs ], so WL2 = 4 ms remains correct.
- a 15-device network, divided into 2 groups and 4 sub-groups, 7 devices in group 1 (3 in
sub-group 1 and 4 in sub-group 2), 8 devices in group 2 (4 in sub-group 3 and 4 in sub-
group 4). The Address can be coded with 6 bits (+ 1 extra bit '0'):
- CTRL1: WUEN = '1', PDN = '0'(so bit 26 = '1' and bit 31 = '0')
- WUR register is unchanged as the data rate mode has not changed so WUR =
'00 1000 0111 1110 0110'
- WUC register is unchanged, so WUC = '1000 0000 1000 1100 0110 0000 0101 0100'
MSB
Individual address
Individual address
4 bits
Address field
Address field
Sub-group address Group address
Sub-group address Group address
2 bits
1 bit
LSB
2186A–WIRE–08/02