参数资料
型号: ADE7518ASTZF8-RL
厂商: Analog Devices Inc
文件页数: 117/128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)
ADE7518
SPI INTERRUPT AND STATUS FLAGS
The SPI interface has several status flags that indicate the status
of the double-buffered receive and transmit registers. Figure 96
shows when the status and interrupt flags are raised. The transmit
interrupt occurs when the transmit shift register is loaded with
not read before new data is ready to be loaded into the SPI/I 2 C
Receive Buffer SFR (SPI2CRx, 0x9B), an overflow condition has
occurred. This overflow condition, indicated by the SPIRxOF
flag, forces the new data to be discarded or overwritten if the
RxOFW bit is set.
the data in the SPI/I 2 C Transmit Buffer SFR (SPI2CTx, 0x9A).
If the SPI master is in transmit operating mode, and the SPI/I 2 C
Transmit Buffer SFR (SPI2CTx, 0x9A) register has not been
written with new data by the beginning of the next byte transfer,
SPITx
SPITxIRQ = 1
TRANSMIT SHIFT REGISTER
SPITx (EMPTY)
SPIRx
SPIRxIRQ = 1
RECEIVE SHIFT REGISTER
SPIRx (FULL)
the transmit operation stops.
STOPS TRANSFER IF TIMODE = 1
SPIRxOF = 1
When a new byte of data is received in the SPI/I C Receive Buffer
2
TRANSMIT SHIFT REGISTER
RECEIVE SHIFT REGISTER
SFR (SPI2CRx, 0x9B), the SPI receive interrupt flag is raised.
If the data in the SPI/I 2 C Receive Buffer SFR (SPI2CRx, 0x9B) is
SCLK
(SPICPOL = 1)
SCLK
(SPICPOL = 0)
SS
Figure 96. SPI Receive and Transmit Interrupt and Status Flags
MISO
MOSI
? MSB BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 LSB
? MSB BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 LSB
SPICPHA = 1
SPIRx AND
SPITx FLAGS
WITH INTMOD = 1
SPIRx AND
SPITx FLAGS
WITH INTMOD = 0
SPICPHA = 0
MISO
MOSI
SPIRx AND
SPITx FLAGS
WITH INTMOD = 1
MSB BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 LSB
MSB BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 LSB
?
?
SPIRx AND
SPITx FLAGS
WITH INTMOD = 0
Figure 97. SPI Timing Configurations
Rev. 0 | Page 117 of 128
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