参数资料
型号: ADE7569ASTZF16
厂商: Analog Devices Inc
文件页数: 124/136页
文件大小: 0K
描述: IC ENERGY METER MCU 16K 64LQFP
标准包装: 1
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: 托盘
ADE7566/ADE7569
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
the data in the SPI/I 2 C Transmit Buffer SFR (SPI2CTx, 0x9A)
Preliminary Technical Data
flag is raised. If the data in the SPI/I 2 C Receive Buffer SFR
(SPI2CRx, 0x9B) register is 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.
SPITx SPIRx
SPITxIRQ = 1 SPIRxIRQ = 1
register. If the SPI master is in transmit operating mode, and the
SPI/I 2 C Transmit Buffer SFR (SPI2CTx, 0x9A) register has not
TRANSMIT SHIFT REGISTER
RECEIVE SHIFT REGISTER
been written with new data by the beginning of the next byte
transfer, the transmit operation stops.
SPITx (EMPTY)
STOPS TRANSFER IF TIMODE = 1
SPIRx (FULL)
SPIRxOF = 1
When a new byte of data is received in the SPI/I 2 C Receive
Buffer SFR (SPI2CRx, 0x9B) register, the SPI receive interrupt
SCLK
(SPICPOL = 1)
SCLK
(SPICPOL=0)
SS_b
TRANSMIT SHIFT REGISTER RECEIVE SHIFT REGISTER
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. PrA | Page 124 of 136
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