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| 型号： | DSPIC30F3014-20I/PT |
| 厂商： | Microchip Technology |
| 文件页数： | 153/153页 |
| 文件大小： | 0K |
| 描述： | IC DSPIC MCU/DSP 24K 44TQFP |
| 产品培训模块： | Serial Communications using dsPIC30F I2C Serial Communications using dsPIC30F SPI Serial Communications using dsPIC30F UART dsPIC30F 12 bit ADC - Part 2 dsPIC30F Addressing Modes - Part 1 dsPIC30F Architecture - Part 1 dsPIC30F DSP Engine & ALU dsPIC30F Interrupts dsPIC30F Motor Control PWM dsPIC Timers Asynchronous Stimulus dsPIC30F Addressing Modes - Part 2 dsPIC30F Architecture - Part 2 dsPIC30F 12-bit ADC Part 1 |
| 标准包装： | 160 |
| 系列： | dsPIC™ 30F |
| 核心处理器： | dsPIC |
| 芯体尺寸： | 16-位 |
| 速度： | 20 MIPS |
| 连通性： | I²C，SPI，UART/USART |
| 外围设备： | 欠压检测/复位，POR，PWM，WDT |
| 输入/输出数： | 30 |
| 程序存储器容量： | 24KB（8K x 24） |
| 程序存储器类型： | 闪存 |
| EEPROM 大小： | 1K x 8 |
| RAM 容量： | 2K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.5 V ~ 5.5 V |
| 数据转换器： | A/D 13x12b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 44-TQFP |
| 包装： | 托盘 |
| 配用： | XLT80PT3-ND - SOCKET TRAN ICE 80MQFP/TQFP AC164305-ND - MODULE SKT FOR PM3 44TQFP |
| 其它名称： | DSPIC30F301420IPT |
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2010 Microchip Technology Inc.
DS70138G-page 99
dsPIC30F3014/4013
15.0
SPI MODULE
The Serial Peripheral Interface (SPI) module is a syn-
chronous serial interface. It is useful for communicating
with other peripheral devices, such as EEPROMs, shift
registers, display drivers and A/D converters, or other
microcontrollers. It is compatible with Motorola’s SPI
and
SIOP
interfaces.
The
dsPIC30F3014
and
dsPIC30F4013 devices feature one SPI module, SPI1.
15.1
Operating Function Description
Each SPI module consists of a 16-bit shift register,
SPIxSR (where x = 1 or 2), used for shifting data in and
out, and a buffer register, SPIxBUF. A control register,
SPIxCON, configures the module. Additionally, a status
register, SPIxSTAT, indicates various status conditions.
The serial interface consists of 4 pins: SDIx (Serial
Data Input), SDOx (Serial Data Output), SCKx (Shift
Clock Input or Output), and SSx (Active-Low Slave
Select).
In Master mode operation, SCKx is a clock output but
in Slave mode, it is a clock input.
A series of eight (8) or sixteen (16) clock pulses shift
out
bits
from
the
SPIxSR
to
SDOx
pin
and
simultaneously shift in data from SDIx pin. An interrupt
is generated when the transfer is complete and the cor-
responding interrupt flag bit (SPI1IF or SPI2IF) is set.
This interrupt can be disabled through an interrupt
enable bit (SPI1IE or SPI2IE).
The receive operation is double-buffered. When a com-
plete byte is received, it is transferred from SPIxSR to
SPIxBUF.
If the receive buffer is full when new data is being trans-
ferred from SPIxSR to SPIxBUF, the module sets the
SPIROV bit, indicating an overflow condition. The
transfer of the data from SPIxSR to SPIxBUF is not
completed and new data is lost. The module does not
respond to SCL transitions while SPIROV is ‘1’,
effectively disabling the module until SPIxBUF is read
by user software.
Transmit writes are also double-buffered. The user
writes to SPIxBUF. When the master or slave transfer
is completed, the contents of the shift register (SPIxSR)
are moved to the receive buffer. If any transmit data has
been written to the buffer register, the contents of the
transmit buffer are moved to SPIxSR. The received
data is thus placed in SPIxBUF and the transmit data in
SPIxSR is ready for the next transfer.
In Master mode, the clock is generated by prescaling
the system clock. Data is transmitted as soon as a
value is written to SPIxBUF. The interrupt is generated
at the middle of the transfer of the last bit.
In Slave mode, data is transmitted and received as
external clock pulses appear on SCKx. Again, the inter-
rupt is generated when the last bit is latched. If SSx
control is enabled, then transmission and reception are
enabled only when SSx = low. The SDOx output is
disabled in SSx mode with SSx high.
The clock provided to the module is (FOSC/4). This
clock is then prescaled by the primary (PPRE<1:0>)
and the secondary (SPRE<2:0>) prescale factors. The
CKE bit determines whether transmit occurs on transi-
tion from active clock state to Idle clock state, or vice
versa. The CKP bit selects the Idle state (high or low)
for the clock.
15.1.1
WORD AND BYTE
COMMUNICATION
A control bit, MODE16 (SPIxCON<10>), allows the
module to communicate in either 16-bit or 8-bit mode.
16-bit operation is identical to 8-bit operation except
that the number of bits transmitted is 16 instead of 8.
The user software must disable the module prior to
changing the MODE16 bit. The SPI module is reset
when the MODE16 bit is changed by the user.
A basic difference between 8-bit and 16-bit operation is
that the data is transmitted out of bit 7 of the SPIxSR for
8-bit operation, and data is transmitted out of bit 15 of
the SPIxSR for 16-bit operation. In both modes, data is
shifted into bit 0 of the SPIxSR.
15.1.2
SDOx DISABLE
A control bit, DISSDO, is provided to the SPIxCON reg-
ister to allow the SDOx output to be disabled. This
allows the SPI module to be connected in an input-only
configuration. SDOx can also be used for general
purpose I/O.
Note:
This data sheet summarizes features of
this group of dsPIC30F devices and is not
intended to be a complete reference
source. For more information on the CPU,
peripherals,
register
descriptions
and
general device functionality, refer to the
“dsPIC30F Family Reference Manual”
(DS70046).
Note:
Both the transmit buffer (SPIxTXB) and
the receive buffer (SPIxRXB) are mapped
to the same register address, SPIxBUF.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DSPIC30F3014-30I/ML | 功能描述:数字信号处理器和控制器 - DSP, DSC General Purpose RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT |
| DSPIC30F3014-30I/P | 功能描述:数字信号处理器和控制器 - DSP, DSC General Purpose RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT |
| DSPIC30F3014-30I/P | 制造商:Microchip Technology Inc 功能描述:16- Bit Digital Signal Controller |
| DSPIC30F3014-30I/PT | 功能描述:数字信号处理器和控制器 - DSP, DSC General Purpose RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT |
| dsPIC30F3014T-20E/ML | 功能描述:数字信号处理器和控制器 - DSP, DSC 44LD 20MIPS 24 KB RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT |
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