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參數(shù)資料
| 型號(hào)： | NRF9E5IC |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 433/868/915MHz RF Transceiver with Embedded 8051 Compatible Microcontroller and 4 Input, 10 Bit ADC |
| 中文描述： | 433/868/915MHz RF收發(fā)器與8051兼容的嵌入式微控制器和4輸入，10位ADC |
| 文件頁(yè)數(shù)： | 20/104頁(yè) |
| 文件大?。?/td> | 1436K |
| 代理商： | NRF9E5IC |
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PRODUCT SPECIFICATION
nRF9E5 Single Chip Transceiver with Embedded Microcontroller and ADC
Main office: Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway -Phone +4772898900 - Fax +4772898989
Revision: 1.1
Page 20 of 104
June 2004
8.1.1
Controlling the Transceiver via SPI Interface.
Normally the SPI hardware interface rather than GPIO programming will do the data
transfers to the transceiver. Please see Table 33 SPI control and data SFR-registers for
use of SPI interface. When SPI_CTRL is ‘0x’, all radio pins are connected directly to
their respective port pins and the SPI functionality may be implemented in software.
7
6
5
4
3
2
1
0
EOC
AM
CD
DR
SBMISO
TRX_CE
TX_EN
SBCSN
SBMOSI
SBSCK
P2 register
bit
Read
Write
SPI Hardware
EOC
AM
CD
DR
CSN
MOSI
SCK
MISO
TRX_CE
TX_EN
MUX
MUX
dataout
clock
MUX
nRF905/AD
from IO-pin
1
0
1
0
0
1
datain
SPI_CTRL==1x
Figure 4 Transceiver interface.
8.1.2
P2 Port Behavior During RESET
During the period the internal reset is active (regardless of whether or not the clock is
running), the P2 outputs that control the nRF905 transceiver subsystem are forced to
their respective default values. When program execution starts, these ports will remain at
those default levels until the programmer actively changes them by writing to the P2
register.
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