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參數(shù)資料
| 型號： | RF2968 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 通信及網絡 |
| 英文描述： | BLUETOOTHTM TRANSCEIVER |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQCC32 |
| 封裝： | 5 X 5 MM, PLASTIC, LCC-32 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 150K |
| 代理商： | RF2968 |
Preliminary
11-129
RF2968
Rev A13 010912
11
T
In a read operation, the baseband sends the device address, READ bit (R/W = 1), and register address to the RF2968
followed by a “turn-around” bit which lasts half a clock cycle. This turn-around allows the RF2968 to drive its requested
data, via
BDDATA
, on the rising edges of
BDCLK
. Following the transfer of the last data bit (D[0]), the baseband drives
BnDEN
high and resumes control of
BDDATA
on the falling edge of the first
BDCLK
pulse after
BnDEN
is driven high.
See Figure 3.
Register Definition
The register address field allows up to 32 registers for various functions. The RF2968 implements only register
addresses 3-7 and 30-31.
Register 3 - IF Register 1 (Read-Only)
Bit Number
Bit Name
Comments
7 - 15
N/A
Not Assigned
0 -6
RSSI[6:0]
The RSSI value indicates the average power measured during the first 10
μ
s
after a packet has been detected. The baseband reads this register to obtain
the current received signal strength indicator measurement. The RSSI value
may range from 0dBm to -127dBm in 1dB increments. (All 0’s indicates
0dBm; all 1’s indicates -127dBm.) The RSSI circuitry is designed to operate
from -20dBm to -80dBm with an accuracy of 4dB at -60dBm.
Example: RSSI[6:0]=[110101] indicates -53dBm.
BDCLK
BnDEN
SlaveDrivingBDDATA
...
...
Master DrivingBDDATA
D15
A6
A5
A3
A2
A1
A0
A7
A4
D1
D2
D0
A6
A7
BDDATA
don't
care
turn-around
turn-around
R/W=read=1
D14
Floating
Floating
Figure 3. DBus Read Programming Diagram
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