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参数资料
| 型号： | M68LC302CAF16VCT |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100 |
| 封装： | 14 X 14 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, PLASITC, LQFP-100 |
| 文件页数： | 78/128页 |
| 文件大小： | 641K |
| 代理商： | M68LC302CAF16VCT |
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ETHERNET Controller
4-14
MC68EN302 REFERENCE MANUAL
MOTOROLA
E—Empty, written by Ethernet controller (=0) and user (=1).
0 = The data buffer associated with this BD has been filled with received data. A
receive buffer descriptor also has the E bit set to 0 when data reception has been
aborted due to an error condition. When E is set to 0, the status, length, reason and
AR Index fields are updated according to the event that just occured during
reception.
1 = The data buffer associated with this BD is empty, or reception is currently in
progress.
RO—Receive Buffer Software Ownership, written by user.
This bit is provided as a software ownership bit, if needed. Hardware does not alter the value
of this bit.
W—Wrap (Final BD in Table), written by user.
0 = This is not the last buffer descriptor in the Rx BD table.
1 = This is the last buffer descriptor in the Rx BD table. After this buffer has been used,
the Ethernet controller receives incoming data into the first BD in the table, allowing
the user to use fewer buffer descriptors than the number programmed by BDSIZE.
I—Interrupt, written by user.
0 = No interrupt is generated after this buffer has been filled.
1 = The RBINT bit in the interrupt event register is set when this buffer has been
completely filled by the Ethernet controller, indicating that the internal 68000 core
is free to process the buffer.
L—Last in Frame, written by Ethernet controller.
0 = The buffer is not the last in a frame.
1 = The buffer is the last in a frame.
F—First in Frame, written by Ethernet controller.
0 = The buffer is not the first in a frame.
1 = The buffer is the first in a frame.
M—Miss, written by Ethernet controller.
This bit is set by the Ethernet controller when the incoming frame is not matched by the
internal address recognition but is accepted because the Ethernet controller is operating in
promiscuous mode (PROM=1). The user can monitor the M-bit to quickly determine whether
the incoming frame was destined to this station. This bit is valid only if the L-bit is set. The
M-bit is valid even if INDEX_EN is not set.
0 = An address match in the CAM or hash algorithm caused frame reception.
1 = No address match occured on the received frame - promiscuous mode operation
caused frame reception.
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相关代理商/技术参数 |
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| M68LC302CAF20VCT | 功能描述:微处理器 - MPU 68K INTGR COM PROC DMA RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
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| M68LC302CPU20VCT | 功能描述:IC MPU NETWORK 20MHZ 100-LQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微处理器 系列:M683xx 标准包装:2 系列:MPC8xx 处理器类型:32-位 MPC8xx PowerQUICC 特点:- 速度:133MHz 电压:3.3V 安装类型:表面贴装 封装/外壳:357-BBGA 供应商设备封装:357-PBGA（25x25） 包装:托盘 |
| M68LGL061X | 制造商:Panasonic Industrial Company 功能描述:SUB ONLY CRT |
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