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参数资料
| 型号： | ADE7518ASTZF8-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 115/128页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER MCU 8K 64LQFP |
| 产品变化通告： | Product Discontinuance 27/Oct/2011 |
| 标准包装： | 1,500 |
| 输入阻抗： | * |
| 测量误差： | * |
| 电压 - 高输入/输出： | * |
| 电压 - 低输入/输出： | * |
| 电流 - 电源： | * |
| 电源电压： | * |
| 测量仪表类型： | * |
| 工作温度： | * |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 带卷 (TR) |
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ADE7518
Table 131. SPI Interrupt Status SFR (SPISTAT, 0xEA)
Bit
7
Mnemonic
BUSY
Default
0
Description
SPI Peripheral Busy Flag.
BUSY Result
0 The SPI peripheral is idle.
1 The SPI peripheral is busy transferring data in slave or master mode.
6
MMERR
0
SPI Multimaster Error Flag.
MMERR Result
0 A multiple master error has not occurred.
1
If the SS_EN bit is set, enabling the slave select input and asserting the SS pin while the SPI
peripheral is transferring data as a master, this flag is raised to indicate the error.
Write a 0 to this bit to clear it.
5
SPIRxOF
0
SPI Receive Overflow Error Flag. Reading the SPI2CRx SFR clears this bit.
SPIRxOF TIMODE Result
0 X The SPI2CRx register contains valid data.
1 1
This bit is set if the SPI2CRx register is not read before the end of the next byte
transfer. If the RxOFW bit is set and this condition occurs, SPI2CRx is overwritten.
4
SPIRxIRQ
0
SPI Receive Mode Interrupt Flag. Reading the SPI2CRx SFR clears this bit.
SPIRxIRQ TIMODE Result
0 X The SPI2CRx register does not contain new data.
1 0
This bit is set when the SPI2CRx register contains new data. If the SPI/I 2 C
interrupt is enabled, an interrupt is generated when this bit is set. If the SPI2CRx
register is not read before the end of the current byte transfer, the transfer stops
and the SS pin is deasserted.
1 1 The SPI2CRx register contains new data.
3
2
SPIRxBF
SPITxUF
0
0
Status Bit for SPI Rx Buffer. When set, the Rx FIFO is full. A read of the SPI2CRx clears this flag.
Status Bit for SPI Tx Buffer. When set, the Tx FIFO is underflowing and data can be written into SPI2CTx.
Write a 0 to this bit to clear it.
1
SPITxIRQ
0
SPI Transmit Mode Interrupt Flag. Writing new data to the SPI2CTx SFR clears this bit.
SPITxIRQ TIMODE Result
0 X The SPI2CTx register is full.
1 0 The SPI2CTx register is empty.
1 1
This bit is set when the SPI2CTx register is empty. If the SPI/I 2 C interrupt is
enabled, an interrupt is generated when this bit is set. If new data is not written
into the SPI2CTx SFR before the end of the current byte transfer, the transfer
stops, and the SS pin is deasserted. Write a 0 to this bit to clear it.
0
SPITxBF
0
Status Bit for SPI Tx Buffer. When set, the SPI Tx buffer is full. Write a 0 to this bit to clear it.
SPI PINS
MISO (Master In, Slave Out Data I/O Pin)
The MISO pin is configured as an input line in master mode
and as an output line in slave mode. The MISO line on the
master (data in) should be connected to the MISO line in the
slave device (data out). The data is transferred as byte-wide
(8-bit) serial data, MSB first.
MOSI (Master Out, Slave In Pin)
The MOSI pin is configured as an output line in master mode
and as an input line in slave mode. The MOSI line on the master
(data out) should be connected to the MOSI line in the slave
device (data in). The data is transferred as byte-wide (8-bit)
serial data, MSB first.
SCLK (Serial Clock I/O Pin)
The master serial clock (SCLK) is used to synchronize the data
being transmitted and received through the MOSI and MISO
data lines. The SCLK pin is configured as an output in master
mode and as an input in slave mode.
In master mode, the bit rate, polarity, and phase of the clock are
controlled by the SPI Configuration SFR 1 (SPIMOD1, 0xE8) and
SPI Configuration SFR 2 (SPIMOD2, 0xE9).
In slave mode, the SPI Configuration SFR 2 (SPIMOD2, 0xE9)
must be configured with the phase and polarity of the expected
input clock.
In both master and slave modes, the data is transmitted on one
edge of the SCLK signal and sampled on the other. It is important,
therefore, that the SPICPHA and SPICPOL bits be configured
the same for the master and slave devices.
Rev. 0 | Page 115 of 128
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