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参数资料
| 型号： | MCP2515DM-PTPLS |
| 厂商： | Microchip Technology |
| 文件页数： | 24/92页 |
| 文件大小： | 0K |
| 描述： | BOARD DAUGHTER PICTAIL MCP2515 |
| 标准包装： | 1 |
| 系列： | * |
| 主要目的： | 接口，CAN 控制器 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | MCP2515，MCP2551 |
| 主要属性： | 置于 PICtail Plus 子板内的 CAN 控制器和 CAN 收发器 |
| 已供物品： | 板，CD |
| 产品目录页面： | 685 (CN2011-ZH PDF) |
| 相关产品： | MCP2515T-I/ST-ND - IC CAN CONTROLLER W/SPI 20TSSOP MCP2515T-I/SO-ND - IC CAN CONTROLLER W/SPI 18SOIC MCP2515T-E/ST-ND - IC CAN CONTROLLER W/SPI 20TSSOP MCP2515T-E/SO-ND - IC CAN CONTROLLER W/SPI 18SOIC MCP2515-E/ST-ND - IC CAN CONTROLLER W/SPI 20TSSOP MCP2515-E/SO-ND - IC CAN CONTROLLER W/SPI 18SOIC MCP2515-E/P-ND - IC CAN CONTROLLER W/SPI 18DIP MCP2515-I/ST-ND - IC CAN CONTROLLER W/SPI 20TSSOP MCP2515-I/SO-ND - IC CAN CONTROLLER W/SPI 18SOIC MCP2515-I/P-ND - IC CAN CONTROLLER W/SPI 18DIP 更多... |
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MCP2515
4.3
Start-of-Frame Signal
4.4.1
DISABLED
If enabled, the Start-Of-Frame signal is generated on
the SOF pin at the beginning of each CAN message
detected on the RXCAN pin.
The RXCAN pin monitors an idle bus for a recessive-
to-dominant edge. If the dominant condition remains
until the sample point, the MCP2515 interprets this as
a SOF and a SOF pulse is generated. If the dominant
condition does not remain until the sample point, the
MCP2515 interprets this as a glitch on the bus and no
SOF signal is generated. Figure 4-1 illustrates SOF
signalling and glitch-filtering.
As with One-Shot mode, one use for SOF signaling is
for TTCAN-type systems. In addition, by monitoring
both the RXCAN pin and the SOF pin, an MCU can
detect early physical bus problems by detecting small
glitches before they affect the CAN communications.
The RXBnBF pins can be disabled to the high-
impedance state by clearing BFPCTRL.BnBFE.
4.4.2 CONFIGURED AS BUFFER FULL
The RXBnBF pins can be configured to act as either
buffer full interrupt pins or as standard digital outputs.
Configuration and status of these pins is available via
the BFPCTRL register (Register 4-3). When set to
operate in Interrupt mode (by setting BFPCTRL.BxBFE
and BFPCTRL.BxBFM bits), these pins are active-low
and are mapped to the CANINTF.RXnIF bit for each
receive buffer. When this bit goes high for one of the
receive buffers (indicating that a valid message has
been loaded into the buffer), the corresponding
RXBnBF pin will go low. When the CANINTF.RXnIF bit
is cleared by the MCU, the corresponding interrupt pin
will go to the logic-high state until the next message is
loaded into the receive buffer.
4.4
RX0BF and RX1BF Pins
In addition to the INT pin, which provides an interrupt
signal to the MCU for many different conditions, the
receive buffer full pins (RX0BF and RX1BF) can be
used to indicate that a valid message has been loaded
into RXB0 or RXB1, respectively. The pins have three
different configurations (Register 4-1):
1.
2.
3.
Disabled
Buffer Full Interrupt
Digital Output
FIGURE 4-1:
START-OF-FRAME SIGNALING
Normal SOF Signaling
START-OF-FRAME BIT
Sample
Point
RXCAN
SOF
Glitch-Filtering
EXPECTED START-OF-FRAME BIT
ID BIT
RXCAN
SOF
DS21801G-page 24
Expected
Sample
Point
BUS IDLE
? 2003-2012 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP2515-E | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Stand-Alone CAN Controller with SPI Interface |
| MCP2515-E/ML | 制造商:Microchip Technology Inc 功能描述: |
| MCP2515-E/P | 功能描述:网络控制器与处理器 IC W/ SPI Inter 125dC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| MCP2515-E/SO | 功能描述:网络控制器与处理器 IC W/ SPI Inter 125dC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| MCP2515-E/SORB4 | 制造商:Microchip Technology Inc 功能描述: |
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