Si4021
 
 
19
9. Wake-Up Timer Command
bit     15     14     13     12     11     10
9
8
7
6
5
4
3
2
1
0
POR
 
1
1
1
r4
r3
r2
r1
r0     m7    m6    m5    m4    m3    m2    m1    m0
E000h
The wake-up time period can be calculated as:
 
T
wake-up
= M * 2
R
[ms] ,
where M is defined by the <m7 : m0> digital value and R is defined by the <r4 : r0> digital value.
The value of R should be in the range of 0 and 23. The maximum achievable wake-up time period can be up to 24 days.
Note:
?    For continual operation the et bit should be cleared and set at the end of every cycle.
 
Software reset: Sending FE00h command to the chip triggers software reset. For more details see the Reset modes section.
 
10. Data Transmit Command
In EEPROM operation mode:
bit     15     14     13     12     11     10
9
8
7
6
5
4
3
2
1
0
POR
 
1
1
0
0
0
1
1
0
n7     n6     n5     n4     n3     n2     n1     n0
- -
In microcontroller slave mode:
bit
7
6
5
4
3
2
1
0
 
1
1
0
0
0
1
1
0
This command indicates that the following bitstream coming in via the serial interface is to be transmitted. In EEPROM mode, the 8-bit value
N of bits <n7 : n0> contains the number of data bytes to follow.
Note:
?    This command is not needed if the transmitters power management bits (ex, es, ea) are fully controlled by the microcontroller and
TX data comes through the FSK pin.
?    If the crystal oscillator was formerly switched off (ex=0), the internal oscillator needs t
sx
 time, to switch on. The actual value
depends on the type of quartz crystal used.
?    If the synthesizer was formerly switched off (es=0), the internal PLL needs t
sp
 startup time. Valid data can be transmitted only when
the internal locking process is finished.
?    In EEPROM mode, before issuing the Data Transmit Command, the power amplifier must be enabled, with the ea or a0 bit in the
Power Management Command. 
?    In EEPROM mode, when N bytes have been read and transmitted the controller continues reading the EEPROM and processing the
data as control commands. This process stops after Sleep Command has been read from the EEPROM.
 
相关PDF资料
SI4022-A0-FT IC TX FSK UNI 868/915MHZ 16TSSOP
SI4711-B30-GM IC TX FM RADIO 76-108MHZ 20UQFN
SI4713-B30-GMR IC TX FM RADIO RPS/RDS 20UQFN
SKY12146-321LF IC VAR VOLT ATTEN 12QFN
SN171GG-NR SNAP PROTOBOARD W/NO RADIO
SWLP.2450.12.4.B.02 ANTENNA WI-FI WLAN 2.4GHZ
TD4A SENSOR RTD LIQUID TEMP 2TERM
TD5A SENSOR RTD TEMP MINI 3LEAD
相关代理商/技术参数
SI4021-A1-FTR 功能描述:射频发射器 Transmitter EZRadio RoHS:否 制造商:Micrel 类型:ASK Transmitter 封装 / 箱体:SOT-23-6 工作频率:300 MHz to 450 MHz 封装:Reel
SI-40222 制造商:BEL 制造商全称:Bel Fuse Inc. 功能描述:SI-40222
SI-40223 制造商:BEL 制造商全称:Bel Fuse Inc. 功能描述:SI-40223
SI-40227 制造商:BEL 制造商全称:Bel Fuse Inc. 功能描述:SI-40227
SI-40228 制造商:Bel Fuse 功能描述:CONN RJ-45 RCP 32 POS 2.54MM SLDR RA TH 48TERM 4PORT - Trays
SI-40229 制造商:BEL 制造商全称:Bel Fuse Inc. 功能描述:SI-40229
Si4022-A0-FT 功能描述:射频发射器 Transmitters IA4222 RoHS:否 制造商:Micrel 类型:ASK Transmitter 封装 / 箱体:SOT-23-6 工作频率:300 MHz to 450 MHz 封装:Reel
SI4022-A0-FTR 功能描述:射频发射器 Transmitter EZRadio RoHS:否 制造商:Micrel 类型:ASK Transmitter 封装 / 箱体:SOT-23-6 工作频率:300 MHz to 450 MHz 封装:Reel