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參數(shù)資料
| 型號： | R80C52XXX-12SHXXX |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, CQCC44 |
| 封裝： | LCC-44 |
| 文件頁數(shù)： | 8/101頁 |
| 文件大?。?/td> | 3398K |
| 代理商： | R80C52XXX-12SHXXX |
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AT86RF212
Figure 5-5. Transition from TRX_OFF to PLL_ON/RX_ON State and further to
RX_ON/PLL_ON
Note:
If TRX_CMD = RX_ON in TRX_OFF state, RX_ON state is entered immediately,
even if the PLL has not settled.
In TRX_OFF state, entering the commands PLL_ON or RX_ON initiates a ramp-up
sequence of the internal 1.8 V voltage regulator for the analog domain (AVREG).
RX_ON state can be entered any time from PLL_ON state, regardless whether the PLL
has already locked, which is indicated by IRQ_0 (PLL_LOCK). Likewise, PLL_ON state
can be entered any time from RX_ON state.
When TRX_OFF_AVDD_EN (register 0x0C, TRX_CTRL_2) is already set in TRX_OFF
state, the analog voltage regulator is turned on immediately and the ramp up sequence
to PLL_ON or RX_ON can be accelerated.
5.1.4.4 State Change from PLL_ON via BUSY_TX to RX_ON States
The transition from PLL_ON to BUSY_TX state and subsequently to RX_ON state is
shown in Figure 5-6.
Figure 5-6. PLL_ON to BUSY_TX to RX_ON Timing for O-QPSK 250 kbit/s Mode
Starting from PLL_ON, it is further assumed that the PLL has already been locked. A
transmission is initiated either by a rising edge of pin 11 (SLP_TR) or by command
TX_START. The PLL settles to the transmit frequency and the PA is enabled. After the
duration of tTR10 (1 symbol period), the AT86RF212 changes into BUSY_TX state,
transmitting the internally generated SHR and the PSDU data of the Frame Buffer. After
completing the frame transmission, indicated by IRQ_3 (TRX_END), the PLL settles
back to the receive frequency within tTR11 and returns to state PLL_ON.
If during BUSY_TX the radio transmitter is requested to change to a receive state, it
automatically proceeds to state RX_ON upon completion of the transmission.
37
8168C-MCU Wireless-02/10
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