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| 型号： | EVAL-ADE5169EBZ-2 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 144/156页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD5169 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电度表/功率表 |
| 嵌入式： | 是 |
| 已用 IC / 零件： | ADE5169 |
| 主要属性： | 用于汇编语言和 C 代码的 IAR 工具 |
| 次要属性： | 隔离和非隔离输出选项 |
| 已供物品： | 板，软件 |
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ADE5166/ADE5169/ADE5566/ADE5569
SS (Slave Select Pin)
In SPI slave mode, a transfer is initiated by the assertion of SS
low. The SPI port then transmits and receives 8-bit data until
the data is concluded by the deassertion of SS according to the
AUTO_SS bit setting (SPIMOD1[4]). In slave mode, SS is always
an input.
In SPI master mode, the SS (P0.7/SS/T1/RxD2) pin can be used
to control data transfer to a slave device. In the automatic slave
select control mode, the SS pin is asserted low to select the slave
device and then raised to deselect the slave device after the transfer
is complete. Automatic slave select control is enabled by setting
the AUTO_SS bit (SPIMOD1[4]).
In a multimaster system, the SS pin can be configured as an
input so that the SPI peripheral can operate as a slave in some
situations and as a master in others. In this case, the slave selects
for the slaves controlled by this SPI peripheral should be
generated with general I/O pins.
SPI MASTER OPERATING MODES
Data Sheet
Continuous Mode, SPICONT (SPIMOD2[7]) = 1
1. Write to the SPI2CTx SFR.
2. SS is asserted low, and a write routine is initiated.
3. Wait for the SPITxIRQ interrupt flag to write to SPI2CTx SFR.
4. Transfer continues until the SPI2CTx register and transmit
shift registers are empty.
5. The SPITxIRQ interrupt flag is set when the SPI2CTx
register is empty.
6. SS is deasserted high.
7. Write to the SPI2CTx SFR to clear the SPITxIRQ inter-
rupt flag.
Figure 112 shows the SPI output for certain automatic chip select
and continuous mode selections. Note that if the continuous mode
is not used, a short delay is inserted between transfers.
SS
SCLK
AUTO_SS = 1
The double-buffered receive and transmit registers can be used to
SPICONT = 1
DIN
DIN1
DIN2
maximize the throughput of the SPI peripheral by continuously
streaming out data in master mode. The continuous transmit mode
is designed to use the full capacity of the SPI. In this mode, the
DOUT
DOUT1
DOUT2
master transmits and receives data until the SPI/I 2 C transmit
buffer SFR (SPI2CTx, Address 0x9A) is empty at the start of a byte
transfer. Continuous mode is enabled by setting the SPICONT bit
(SPIMOD2[7]). The SPI peripheral also offers a single byte read/
SS
SCLK
write function.
In master mode, the type of transfer is handled automatically,
depending on the configuration of the SPICONT bit. The
AUTO_SS = 1
SPICONT = 0
DIN
DIN1
DIN2
following procedures show the sequence of events that should be
performed for each master operating mode. Based on the SS
configuration, some of these events take place automatically.
Procedures for Using SPI as a Master
Single-Byte Write Mode, SPICONT (SPIMOD2[7]) = 0
DOUT
SS
SCLK
DOUT1
DOUT2
1.
2.
3.
Write to the SPI2CTx SFR.
SS is asserted low, and a write routine is initiated.
The SPITxIRQ interrupt flag (SPISTAT[1]) is set when the
AUTO_SS = 0
SPICONT = 0
(MANUAL SS CONTROL)
DIN
DIN1
DIN2
SPI2CTx register is empty.
4.
SS is deasserted high.
5.
Write to the SPI2CTx SFR to clear the SPITxIRQ inter-
DOUT
DOUT1
DOUT2
rupt flag.
Figure 112. Automatic Chip Select and Continuous Mode Output
Note that reading the contents of the SPI/I 2 C receive buffer SFR
(SPI2CRx, Address 0x9B) should be done using a 2-cycle instruc-
tion set, such as MOV A or SPI2CRX. Using a 3-cycle instruction
set, such as MOV 0x3D or SPI2CRX, does not transfer the right
information into the target register.
Rev. D | Page 144 of 156
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| EVAL-ADE5169F62EBZ | 制造商:Analog Devices 功能描述:EVALUATION BOARD FOR ADE5169 - Boxed Product (Development Kits) 制造商:Rochester Electronics LLC 功能描述: |
| EVAL-ADE5569F62EBZ | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver |
| EVAL-ADE7169EBZ-2 | 功能描述:BOARD EVALUATION FOR ADE7169F16 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| EVAL-ADE7169F16EB | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC and LCD driver |
| EVAL-ADE7169F16EBZ | 制造商:Analog Devices 功能描述:Evaluation Board For ADE7169 制造商:Analog Devices 功能描述:EVAL BD FOR ADE7169 - Bulk |
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