- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45215 > MC68LC302PU16VCT (MOTOROLA INC) 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100 PDF資料下載
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)： | 82/128頁 |
| 文件大小： | 641K |
| 代理商： | MC68LC302PU16VCT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁當(dāng)前第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁
ETHERNET Controller
4-18
MC68EN302 REFERENCE MANUAL
MOTOROLA
CSL—Carrier Sense Lost, written by Ethernet controller (only valid if L = 1).
Carrier sense dropped out or was never asserted during a collision free frame transmission.
Data Length, written by user.
Data length is the number of octets the Ethernet controller should transmit from this BD’s
data buffer. It is never modified by the Ethernet controller. The value of this field must be
greater than zero.
Tx Buffer Pointer, written by user.
The transmit buffer pointer containing the address of the associated data buffer, may be
even or odd. The buffer must reside in memory external to the MC68EN302. This value is
never modified by the Ethernet controller.
4.3 DMA AND BUFFER DESCRIPTOR LOGIC
The DMA and buffer descriptor modules transfer data between external memory and the TX/
RX FIFOs.
4.3.1 BUFFER DESCRIPTOR LOGIC
Buffer descriptors are stored in the on-chip dual-port RAM. The RAM is sufficient to store
128 buffer descriptors of 4 sixteen-bit-words. The features of the BD circuitry are as follows:
Flexible Buffer Descriptor allocation between transmit and receive;
Multiple buffers per frame
Transmit buffers may start on any byte boundary, Receive buffers must start on even
byte boundaries.
Maximum Receive Buffer size is user controllable;
The Buffer Descriptor space is divided between transmit and receive in various
configurations depending on the value of BDSIZE in the EDMA register. Table 4-2 shows
the starting and ending addresses (offset from MOBA) in the BD RAM for the four options.
The Maximum Receive Buffer Length field (MRBL) in the EMRBLR register determines the
default length of all receive buffers besides the last buffer of a frame (the last buffer is usually
shorter in length than the preceding buffers).
On the transmit side, the MC68EN302 may have up to two separate frames with open
buffers at a specific point in time. While the first frame completes the transmit process, DMA
Table 4-2. BD RAM Address Ranges
BDSIZE
TRANSMIT BUFFER
DESCRIPTOR RANGE
RECEIVE BUFFER
DESCRIPTOR RANGE
NUMBER OF TRANSMIT
BUFFERS
NUMBER OF RECEIVE
BUFFERS
$00
$C00 - $C3F
$C40 - $FFF
8
120
$01
$C00 - $C7F
$C80 - $FFF
16
112
$10
$C00 - $CFF
$D00 - $FFF
32
96
$11
$C00 - $DFF
$E00 - $FFF
64
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M68LC302CPU16VCT | 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100 |
| MC68LC302PU20VCT | 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100 |
| MC68302CPV16VC | 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP144 |
| MC68LC302PU20VCT | 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100 |
| MC68EN302CPV20BT | 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP144 |
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(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。