Rainbow Electronics AT86RF230 - Manual (Page 35)

35
AT86RF230
5131A-ZIGB-06/14/06
Bit Field Name Reset R/W Comments
7:0 ED_LEVEL 0 R ED level for current channel.
The min. ED value (0) indicates receiver power less than or equal to
-91 dBm. The range is 84 dB with a resolution of 1 dB and an
absolute accuracy of ±5 dB.
Table 8-7. 0x07 - PHY_ED_LEVEL
Note: A write access initiates the ED measurement (ED.request).
Bit Field Name Reset R/W Comments
7 CCA_REQUEST 0 R/W 1’d1: starts a CCA check (CCA.request)
read value always returns with “0”
6:5 CCA_MODE 1 R/W CCA Mode:
2’d0:
Mode 1, energy above threshold
2’d1: Mode 1, energy above threshold
2’d2: Mode 2, carrier sense only
2’d3: Mode 3, carrier sense with energy above threshold
Channel:
According to IEEE802.15.4 only 11 to 26 are valid.
All unused values are reserved.
Channel Mapping
Channel Number Frequency [MHz]
11 2405
12 2410
13 2415
14 2420
15 2425
16 2430
17 2435
18 2440
19 2445
20 2450
21 2455
22 2460
23 2465
24 2470
25 2475
4:0 CHANNEL 11 R/W
26 2480
Table 8-8. 0x08 - PHY_CC_CCA