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参数资料
| 型号： | 4463-TCE27F868-EK |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 43/56页 |
| 文件大小： | 0K |
| 描述： | KIT EZRADIO TEST CARD SI4463 TX |
| 设计资源： | 4463-TCE27F868 BOM 4463-TCE27F868 PCB 4463-TCE27F868 SCH |
| 标准包装： | 1 |
| 系列： | EZRadioPRO® |
| 类型： | 收发器，ISM |
| 频率： | 868MHz |
| 适用于相关产品： | Si4463 |
| 已供物品： | 板 |
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4 ? 2
32 ? 768
Si4464/63/61/60
8.2. Low Duty Cycle Mode (Auto RX Wake-Up)
The low duty cycle (LDC) mode is implemented to automatically wake-up the receiver to check if a valid signal is
available or to enable the transmitter to send a packet. It allows low average current polling operation by the Si446x
for which the wake-up timer (WUT) is used. RX and TX LDC operation must be set via the
GLOBAL_WUT_CONFIG property when setting up the WUT. The LDC wake-up period is determined by the
following formula:
WUT_R
LDC = WUT_LDC ? ----------------------------- ? ms ?
where the WUT_LDC parameter can be set by the GLOBAL_WUT_LDC property. The WUT period must be set in
conjunction with the LDC mode duration; for the relevant API properties, see the wake-up timer (WUT) section.
Figure 18. RX and TX LDC Sequences
The basic operation of RX LDC mode is shown in Figure 19. The receiver periodically wakes itself up to work on
RX_STATE during LDC mode duration. If a valid preamble is not detected, a receive error is detected, or an entire
packet is not received, the receiver returns to the WUT state (i.e., ready or sleep) at the end of LDC mode duration
and remains in that mode until the beginning of the next wake-up period. If a valid preamble or sync word is
detected, the receiver delays the LDC mode duration to receive the entire packet. If a packet is not received during
two LDC mode durations, the receiver returns to the WUT state at the last LDC mode duration until the beginning
of the next wake-up period.
Figure 19. Low Duty Cycle Mode for RX
In TX LDC mode, the transmitter periodically wakes itself up to transmit a packet that is in the data buffer. If a
packet has been transmitted, nIRQ goes low if the option is set in the INT_CTL_ENABLE property. After
transmitting, the transmitter immediately returns to the WUT state and stays there until the next wake-up time
expires.
Rev 1.2
43
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