AT86RF212B_14 Datasheet, PDF (53/212 Pages) ATMEL Corporation – Fully integrated 769 – 935MHz transceiver including

AT86RF212B
7.2.3.2 Configuration of IEEE Compliant Scenarios
Device not operating as a PAN Coordinator
Table 7-6 shows a typical Atmel AT86RF212B RX_AACK configuration of an
IEEE 802.15.4 device operating as a normal device, rather than a PAN coordinator or
router.
Table 7-6. Configuration of IEEE 802.15.4 Devices.
Register Register Register Name
Address
Bits
Description
0x20,0x21
0x22,0x23
0x24
…
0x2B
SHORT_ADDR_0/1
PAN_ADDR_0/1
IEEE_ADDR_0
…
IEEE_ADDR_7
Setup Frame Filter, see Section 8.2.1.
0x0C
7
RX_SAFE_MODE
0: Disable frame protection.
1: Enable frame protection.
0x2C
0x2E
0
SLOTTED_OPERATION 0: Slotted acknowledgment transmissions
are not to be used.
1: Slotted acknowledgment transmissions
are to be used, see Section 7.2.3.5.
7:6 AACK_FVN_MODE
Controls the ACK behavior, depending on
FCF frame version number.
b00: Acknowledges only frames with
version number 0, that is according to
IEEE 802.15.4-2003 frames.
b01: Acknowledges only frames with
version number 0 or 1, that is frames
according to IEEE 802.15.4-2006.
b10: Acknowledges only frames with
version number 0 or 1 or 2.
b11: Acknowledges all frames,
independent of the FCF frame version
number.
Notes:
1. The default value of the short address is 0xFFFF. Thus, if no short address has
been configured, only frames with either the broadcast address or the IEEE
address are accepted by the frame filter.
2. In the IEEE 802.15.4-2003 standard the frame version subfield does not yet
exist but is marked as reserved. According to this standard, reserved fields
have to be set to zero. At the same time, the IEEE 802.15.4-2003 standard
requires ignoring reserved bits upon reception. Thus, there is a contradiction in
the standard which can be interpreted in two ways:
a. If a network should only allow access to nodes compliant to
IEEE 802.15.4-2003, then AACK_FVN_MODE should be set to zero.
b. If a device should acknowledge all frames independent of its frame version,
AACK_FVN_MODE should be set to three. However, this may result in
conflicts with co-existing IEEE 802.15.4-2006 standard compliant networks.
The same holds for PAN coordinators, see below.
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