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参数资料
| 型号： | DR-TRC101-315-DK |
| 厂商： | RFM |
| 文件页数： | 20/42页 |
| 文件大小： | 0K |
| 描述： | RFIC TRANCEIVER DEVELOPMENT KIT |
| 产品变化通告： | RFIC Obsolescence 15/Sept/2009 |
| 标准包装： | 1 |
| 类型： | 收发器，SRR |
| 频率： | 315MHz |
| 适用于相关产品： | TRC101-315 |
| 已供物品： | 2 个板，2 根天线，电池，线缆，CD |
| 其它名称： | 583-1051 |
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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
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