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參數資料
| 型號： | ADUC702X |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 32位微控制器 |
| 英文描述： | Precision Analog Microcontroller 12-bit Analog I/O, ARM7TDMI MCU |
| 中文描述： | 精密模擬微控制器的12位模擬I / O，ARM7TDMI的微控制器 |
| 文件頁數： | 58/80頁 |
| 文件大小： | 840K |
| 代理商： | ADUC702X |
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ADuC702x Series
Preliminary Technical Data
Rev. PrB | Page 58 of 80
Cleared
by user, the new serial byte received is discarded
SPITX underflow mode
Set
by user to transmit the previous data
Cleared
by user to transmit 0
Transfer and interrupt mode (master mode)
Set
by user to initiate transfer with a write to the SPITX register. Interrupt will occur when TX is empty
Cleared
by user to initiate transfer with a read of the COMRX register. Interrupt will occur when RX is full
LSB first transfer enable bit
Set
by user the LSB is transmitted first
Cleared
by user the MSB is transmitted first
Reserved
Serial clock polarity mode bit
Set
by user, the serial clock idles high
Cleared
by user the serial clock idles low
Serial clock phase mode bit
Set
by user, the serial clock pulses at the beginning of each serial bit transfer
Cleared
by user, the serial clock pulses eat end of each serial bit transfer
Master mode enable bit
Set
by user to enable master mode
Cleared
by user to enable slave mode
SPI enable bit
Set
by user to enable the SPI
Cleared
to disable the SPI
7
6
5
4
3
2
1
0
Table 47: SPISTA MMR Bit Descriptions
Bit
7-6
5
Description
Reserved
SPIRX data register overflow status bit
Set
if SPIRX is overflowing
Cleared
by reading SPISRX register
SPIRX data register IRQ
Set
automatically if bit 3 or 5 are set
Cleared
by reading SPIRX register
SPIRX data register full status bit
Set
automatically if a valid data is present in the SPIRX register
Cleared
by reading SPIRX register
SPITX data register underflow status bit
Set
automatically if SPITX is under flowing
Cleared
by writing in the SPITX register
SPITX data register IRQ
Set
automatically if bit 0 is clear or bit 2 is set
Cleared
by writing in the SPITX register or if finished transmission disabling the SPI
SPITX data register empty status bit
Set
by writing to SPITX to send data. This bit is set during transmission of data
Cleared
when SPITX is empty
4
3
2
1
0
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