参数资料
型号: SM1212E433
厂商: Semtech
文件页数: 59/77页
文件大小: 0K
描述: RF EVAL FOR SX1212 433MHZ ISM
标准包装: 1
类型: 收发器,ISM
频率: 433MHz
适用于相关产品: SX1212E
已供物品: 模块,天线,电源,软件
SX1212
ADVANCED COMMUNICATIONS & SENSING
OOK demodulator threshold type:
00
fixed threshold mode
OOK_thresh_type
3-2
1
r/w
01
peak mode (d)
10
11
average mode
reserved
Gain on the IF chain:
00
maximal gain (0dB) (d)
IF_gain
1-0
1
r/w
01
-4.5 dB
10
11
-9dB
-13.5 dB
Single side frequency deviation in FSK Transmit mode:
Refer to sections 3.3.4 and 3.3.5
Freq_dev
7-0
2
r/w
Fdev =
f XTAL
32 ? (D + 1)
, 0 ≤ D ≤ 255, where D is the value in the register.
(d): D = “00000011” => Fdev = 100 kHz
C coefficient of the bit rate
BR_C
7-0
3
r/w
Bit Rate =
f XTAL
2 ? (C + 1).(D + 1)
, 0 ≤ C ≤ 255, where C is the value in the register.
(d): C = “0000111” => Bit Rate = 25 kb/s NRZ
D coefficient of the bit rate
BR_D
7-0
4
r/w
Bit Rate =
f XTAL
2 ? (C + 1).(D + 1)
, 15 ≤ D ≤ 255, where D is the value in the register.
(d): D = “0001111” => Bit Rate = 25 kb/s NRZ
Ramp control of the rise and fall times of the Tx PA regulator output voltage in
OOK mode:
PA_ramp
7-6
5
r/w
00
01
3us
8.5 us
10
11
15 us
23 us (d)
Enables the low power mode of the receiver by reducing the bias current
Low_power_rx
5
5
r/w
of the LNA.
0 -> Low power mode disabled (d)
1 -> Low power mode enabled
Trim_band
2-1
5
r/w
VCO trimming: (d) 11
Selection between the two RF frequencies defined by the
RF_frequency
0
5
r/w
SynthRi, SynthPi, and SynthSi registers:
0 -> frequency 1 for R1,P1,S1 (d)
1 -> frequency 2 for R2,P2,S2
R1
P1
S1
R2
P2
S2
Res
Rev 2 – June 18th, 2009
7-0
7-0
7-0
7-0
7-0
7-0
2-0
6
7
8
9
10
11
12
r/w
r/w
r/w
r/w
r/w
r/w
r/w
R counter, active when RPS_select=”0”
(d):6Bh; default values of R1, P1, S1 generate 434.0 MHz in FSK mode
P counter, active when RPS_select=”0”
(d): 2Ah; default values of R1, P1, S1 generate 434.0 MHz in FSK mode
S counter, active when RPS_select=”0”
(d): 1Eh; default values of R1, P1, S1 generate 434.0 MHz in FSK mode
R counter, active when RPS_select=”1”
(d): 77h; default values of R2, P2, S2 generate 435.0 MHz in FSK mode
P counter, active when RPS_select=”1”
(d): 2Fh; default values of R2, P2, S2 generate 435.0 MHz in FSK mode
S counter, active when RPS_select=”1”
(d): 19h; default values of R2, P2, S2 generate 435.0 MHz in FSK mode
Reserved
(d):”000”
Page 59 of 77
www.semtech.com
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