參數(shù)資料
型號： MC68LC302PU16VCT
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100
封裝： 14 X 14 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, PLASITC, LQFP-100
文件頁數(shù)： 88/128頁
文件大小： 641K
代理商： MC68LC302PU16VCT
ETHERNET Controller
MOTOROLA
MC68EN302 REFERENCE MANUAL
4-23
Broadcast and multicast frames may be either unconditionally accepted or unconditionally
rejected. Note that multicast frames may be conditionally accepted based on a matching
table entry, either perfect or hash. Refer to Figure 4-4 and Table 4-3 for broadcast and
multicast frame address recognition.
Physical addresses are compared to perfect-match entries and either accepted or rejected.
If no perfect match occurs, the addresses may then be accepted (but not rejected) on the
basis of a hash match. Refer to Figure 4-4 and Table 4-4 for physical address recognition.
A physical address, but not a multicast address, may be rejected on the basis of a perfect
match. A hash table match alone on a physical address is not sufficient to reject that frame.
The address recognition memory is not initialized at reset; the user must initialize it before
setting ETHER_EN in ECNTRL. Perfect-match entries which are unused should be set to
all 1’s (broadcast address) which is a safe value since broadcast frame handling occurs
independently of any table entries. Unused hashmode entry bits must be set to 0.
4.6.1 BUFFER DESCRIPTOR MODIFICATION
Index values and reason fields may be passed into the upper byte of the receive buffer
descriptor’s data pointer by setting the INDEX_EN bit. This may help improve software
efficiency. If INDEX_EN is cleared, the receive buffer descriptor data pointer is not modified
by the MC68EN302. If INDEX_EN is set, the index value and reason field will be written into
all the BDs of a frame.
There are four reasons, not counting promiscuous mode, which cause a frame to be
accepted:
1. The frame is a multicast or broadcast frame and the appropriate MULT bits are set.
2. A perfect address match occurs.
3. A hash match occurs.
4. No perfect match occurs, the frame has a physical, not multicast address, and the
PA_REJ bit is set.
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PDF描述
M68LC302CPU16VCT 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68LC302PU20CT 功能描述:微處理器 - MPU 20MHz 2MIPS RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68LC302PU20VCT 功能描述:IC MPU NETWORK 20MHZ 100-LQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:M683xx 標準包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點:- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA（25x25） 包裝:托盤
MC68LC302PU25CT 功能描述:微處理器 - MPU 25MHz 2.5MIPS RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68LK332ACAG16 功能描述:32位微控制器 - MCU 32BIT MCU 2KRAM TPU QSM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MC68LK332ACAG16 制造商:Freescale Semiconductor 功能描述:Microcontroller
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