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参数资料
| 型号： | MCP2515DM-PTPLS |
| 厂商： | Microchip Technology |
| 文件页数： | 59/92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
10.0
MODES OF OPERATION
When in Sleep mode, the MCP2515 stops its internal
oscillator. The MCP2515 will wake-up when bus activity
The MCP2515 has five modes of operation. These
modes are:
occurs or when the MCU sets, via the SPI interface, the
CANINTF.WAKIF bit to ‘generate’ a wake-up attempt
1.
2.
3.
4.
Configuration mode
Normal mode
Sleep mode
Listen-Only mode
(the CANINTE.WAKIE bit must also be set in order for
the wake-up interrupt to occur).
The TXCAN pin will remain in the recessive state while
the MCP2515 is in Sleep mode.
5.
Loopback mode
10.2.1
WAKE-UP FUNCTIONS
The operational mode is selected via
CANCTRL. REQOP bits (see Register 10-1).
the
The device will monitor the RXCAN pin for activity while
it is in Sleep mode. If the CANINTE.WAKIE bit is set,
When changing modes, the mode will not actually
change until all pending message transmissions are
complete. The requested mode must be verified by
reading the CANSTAT.OPMODE bits (see
Register 10-2).
the device will wake-up and generate an interrupt.
Since the internal oscillator is shut down while in Sleep
mode, it will take some amount of time for the oscillator
to start-up and the device to enable itself to receive
messages. This Oscillator Start-up Timer (OST) is
defined as 128 T OSC .
10.1
Configuration Mode
The device will ignore the message that caused the
The MCP2515 must be initialized before activation.
This is only possible if the device is in the Configuration
mode. Configuration mode is automatically selected
after power-up, a Reset or can be entered from any
other mode by setting the CANTRL.REQOP bits to
‘ 100 ’. When Configuration mode is entered, all error
counters are cleared. Configuration mode is the only
mode where the following registers are modifiable:
wake-up from Sleep mode, as well as any messages
that occur while the device is ‘waking up’. The device
will wake-up in Listen-Only mode. The MCU must set
Normal mode before the MCP2515 will be able to
communicate on the bus.
The device can be programmed to apply a low-pass
filter function to the RXCAN input line while in internal
Sleep mode. This feature can be used to prevent the
?
?
?
CNF1, CNF2, CNF3
TXRTSCTRL
Filter registers
device from waking up due to short glitches on the CAN
bus lines. The CNF3.WAKFIL bit enables or disables
the filter.
?
Mask registers
10.3
Listen-Only Mode
10.2
Sleep Mode
Listen-Only mode provides a means for the MCP2515
to receive all messages (including messages with
The MCP2515 has an internal Sleep mode that is used
to minimize the current consumption of the device. The
SPI interface remains active for reading even when the
MCP2515 is in Sleep mode, allowing access to all
registers.
To enter Sleep mode, the mode request bits are set in
the CANCTRL register (REQOP<2:0>). The
CANSTAT.OPMODE bits indicate operation mode.
These bits should be read after sending the Sleep
command to the MCP2515. The MCP2515 is active
and has not yet entered Sleep mode until these bits
indicate that Sleep mode has been entered.
When in internal Sleep mode, the wake-up interrupt is
still active (if enabled). This is done so that the MCU
can also be placed into a Sleep mode and use the
MCP2515 to wake it up upon detecting activity on the
bus.
? 2003-2012 Microchip Technology Inc.
errors) by configuring the RXBnCTRL.RXM<1:0> bits.
This mode can be used for bus monitor applications or
for detecting the baud rate in ‘hot plugging’ situations.
For auto-baud detection, it is necessary that at least
two other nodes are communicating with each other.
The baud rate can be detected empirically by testing
different values until valid messages are received.
Listen-Only mode is a silent mode, meaning no
messages will be transmitted while in this mode
(including error flags or acknowledge signals). In
Listen-Only mode, both valid and invalid messages will
be received regardless of filters and masks or RXMn
Receive Buffer mode bits. The error counters are reset
and deactivated in this state. The Listen-Only mode is
activated by setting the mode request bits in the
CANCTRL register.
DS21801G-page 59
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相关代理商/技术参数 |
参数描述 |
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| 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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