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| 型號(hào)： | MQ80C32E-36SC |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 36 MHz, MICROCONTROLLER, CQFP44 |
| 文件頁(yè)數(shù)： | 127/198頁(yè) |
| 文件大?。?/td> | 4822K |
| 代理商： | MQ80C32E-36SC |
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34
8111C–MCU Wireless–09/09
AT86RF231
pin 8 (/RST). A successful state change can be verified by reading the radio transceiver status
from register 0x01 (TRX_STATUS).
If TRX_STATUS = 0x1F (STATE_TRANSITION_IN_PROGRESS) the AT86RF231 is on a state
transition. Do not try to initiate a further state change while the radio transceiver is in
STATE_TRANSITION_IN_PROGRESS.
Pin SLP_TR is a multifunctional pin, refer to Section 6.5 “Sleep/Wake-up and Transmit Signal
(SLP_TR)” on page 27. Dependent on the radio transceiver state, a rising edge of pin SLP_TR
causes the following state transitions:
Pin 8 (/RST) causes a reset of all registers (register bits CLKM_CTRL are shadowed, for details
refer to Section 9.6.4 “Master Clock Signal Output (CLKM)” on page 117) and forces the radio
transceiver into TRX_OFF state. However, if the device was in P_ON state it remains in the
P_ON state.
For all states except SLEEP, the state change commands FORCE_TRX_OFF or TRX_OFF lead
to a transition into TRX_OFF state. If the radio transceiver is in active receive or transmit states
(BUSY_*), the command FORCE_TRX_OFF interrupts these active processes, and forces an
immediate transition to TRX_OFF. In contrast a TRX_OFF command is stored until an active
state (receiving or transmitting) has been finished. After that the transition to TRX_OFF is
performed.
For a fast transition from receive or active transmit states to PLL_ON state the command
FORCE_PLL_ON is provided. In contrast to FORCE_TRX_OFF this command does not disable
the PLL and the analog voltage regulator AVREG. It is not available in states SLEEP, P_ON,
RESET, TRX_OFF, and all *_NOCLK states.
The completion of each requested state change shall always be confirmed by reading the regis-
ter bits TRX_STATUS (register 0x01, TRX_STATUS).
7.1.2
Basic Operating Mode Description
7.1.2.1
P_ON - Power-On after V
DD
When the external supply voltage (V
DD) is firstly applied to the AT86RF231, the radio transceiver
goes into the P_ON state performing an on-chip reset. The crystal oscillator is activated and the
default 1 MHz master clock is provided at pin 17 (CLKM) after the crystal oscillator has stabi-
lized. CLKM can be used as a clock source to the microcontroller. The SPI interface and digital
voltage regulator are enabled.
The on-chip power-on-reset sets all registers to their default values. A dedicated reset signal
from the microcontroller at pin 8 (/RST) is not necessary, but recommended for hardware / soft-
ware synchronization reasons.
TRX_OFF
SLEEP
(level sensitive)
RX_ON
RX_ON_NOCLK
(level sensitive)
PLL_ON
BUSY_TX
Whereas the falling edge of pin SLP_TR causes the following state transitions:
SLEEP
TRX_OFF
(level sensitive)
RX_ON_NOCLK
RX_ON
(level sensitive)
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