Transmit Register [POR=B8AAh]
Bit
15
1
Bit
14
0
Bit
13
1
Bit
12
1
Bit
11
1
Bit
10
0
Bit
9
0
Bit
8
0
Bit
7
TX7
Bit
6
TX6
Bit
5
TX5
Bit
4
TX4
Bit
3
TX3
Bit
2
TX2
Bit
1
TX1
Bit
0
TX0
The Transmit Register holds the 8 bits to be transmitted. Bit [7] of the Configuration Register must be set
(logic ‘1’) in order to use this. If Bit [7] is not set, use pin 6 to manually modulate the data.
The initial value on power-up of the register is AAh. This can be used to send a preamble signal by
setting Bit [5] of the Power Management Register (See Figure 5 below). When this bit is set, transmission
begins immediately and the initial value AAh is sent. The SDO pin(4) may be monitored to see when the
next byte of data may be written to the register (SDO is logic ‘1’). It is recommended that the register be
preloaded with a preamble regardless of the POR value.
Initial Setup
TXEN = 0
FIGURE 5. Initial TX Register Setting
Bit [15..8] - Command Code : These bits are the command code that is sent serially to the processor that
identifies the bits to be written to the Transmit Register.
Bit [7..0] – Transmit Byte : The data byte to be sent is written here. As soon as the power amplifier is
enabled the data byte is sent. The SDO pin(4) may be monitored to determine when the byte has been
sent.
Sequential Byte Write Method (Recommended)
The transmit register may be continuously accessed by holding the nCS pin (3) ‘Low” for the duration of
the data stream. On the first falling edge of nCS the register command should be issued as normal.
Sequential byte writes to the register afterwards will load the transmit register directly without having to re-
issue the command byte. The SDO pin (4) may be used as a “Transmit Register Empty” flag to write the
next byte. Figure 6 shows the timing sequence.
nCS
SCK
SDI
COMMAND
DATA BYTE 1
DATA BYTE 2
DATA BYTE 3
SDO
Figure 6. Sequential Byte Write Timing
www.RFM.com
Email: info@rfm.com
Page 20 of 42
?by RF Monolithics, Inc.
TRC101 - 4/8/08
相关PDF资料
DR-TRC102-915-DK RFIC TRANCEIVER DEVELOPMENT KIT
DR-TRC103-915-DK RFIC TRANCEIVER DEVELOPMENT KIT
DR-TRC103-950-DK KIT DEV 950MHZ RFIC SRR
DR-TRC105-372-DK DEV KIT TRC105
DR-TRC105-450-EV BOARD EVALUATION 450MHZ RFM RFIC
DR-TXC100-433 BOARD EVALUATION 433MHZ TXC100
DR-WLS1273L-EV KIT EVAL FOR WLS1273L
DR7000-DK 3G DEVELOPMENT KIT 433.92MHZ
相关代理商/技术参数
DR-TRC102-433-DK 功能描述:射频开发工具 TRC102 Development Kit 430-439 MHz RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V
DR-TRC102-868-DK 功能描述:射频开发工具 TRC102 Development Kit 860-879 MHz RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V
DR-TRC102-915-DK 功能描述:射频开发工具 TRC102 Development Kit 900-929 MHz RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V
DR-TRC103-868-DK 功能描述:射频开发工具 TRC103 Development Kit 863-870 MHz RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V
DR-TRC103-868-EV 功能描述:BOARD EVALUATION 868MHZ RFM RFIC RoHS:否 类别:RF/IF 和 RFID >> RF 评估和开发套件,板 系列:- 标准包装:1 系列:- 类型:GPS 接收器 频率:1575MHz 适用于相关产品:- 已供物品:模块 其它名称:SER3796
DR-TRC103-915-DK 功能描述:射频开发工具 TRC103 Development Kit 900-928 MHz RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V
DR-TRC103-915-EV 功能描述:BOARD EVALUATION 915MHZ RFM RFIC RoHS:否 类别:RF/IF 和 RFID >> RF 评估和开发套件,板 系列:- 标准包装:1 系列:- 类型:GPS 接收器 频率:1575MHz 适用于相关产品:- 已供物品:模块 其它名称:SER3796
DR-TRC103-950-DK 功能描述:KIT DEV 950MHZ RFIC SRR RoHS:否 类别:RF/IF 和 RFID >> RF 评估和开发套件,板 系列:- 标准包装:1 系列:- 类型:GPS 接收器 频率:1575MHz 适用于相关产品:- 已供物品:模块 其它名称:SER3796