- 您现在的位置：买卖IC网 > PDF目录80358 > MC68LC302PU16 (MOTOROLA INC) 32-BIT, 16.67 MHz, RISC MICROCONTROLLER, PQFP100 PDF资料下载
参数资料
| 型号： | MC68LC302PU16 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 16.67 MHz, RISC MICROCONTROLLER, PQFP100 |
| 封装： | TQFP-100 |
| 文件页数： | 159/182页 |
| 文件大小： | 618K |
| 代理商： | MC68LC302PU16 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页第155页第156页第157页第158页当前第159页第160页第161页第162页第163页第164页第165页第166页第167页第168页第169页第170页第171页第172页第173页第174页第175页第176页第177页第178页第179页第180页第181页第182页
Communications Processor (CP)
MOTOROLA
MC68LC302 REFERENCE MANUAL
4-11
rupt in order to determine parity and character length (this information may be overwritten
when the next character interrupt is presented to the host). The host uses the two received
characters to determine 1) whether a properly formed “at” or “AT” was received, and 2) the
proper character format (character length, parity).
Once this is decided, three possible actions can result. First, the host may decide that the
data received was not a proper “at” or “AT”, and issue the Enter_Baud_Hunt command to
cause the autobaud controller to resume the search process. Second, the host may decide
the “at” or “AT” is proper and simply continue to receive characters in BISYNC mode. Third,
the M68000 core may decide that the “at” or “AT” is proper, but a change in character length
or parity is required.
4.3.9.2 AUTOBAUD CHANNEL TRANSMIT PROCESS. The autobaud microcode pack-
age supports two methods for transmission. The first method is automatic echo which is sup-
ported directly in the SCC hardware, and the second method is a smart echo or software
transmit which is supported with an additional clock and software.
Automatic echo is enabled by setting the DIAG bits in the SCC mode register (SCM) to ‘10’
and asserting the CD pin (externally on SCC1 and on SCC2 and SCC3, either externally or
by leaving the pin as a general purpose input). The ENT bit of the SCC should remain
cleared. The transmitter is not used, so this echoing method does not impact performance.
The smart echo or software transmit requires use of an additional clock and the transmitter,
so the overall performance could be affected if other SCCs are running. This method
requires an additional clock for sampling the incoming bit stream since the baud rate gener-
ator (BRG) must be used to provide the correct frequency for transmission. The user needs
to provide the sampling clock that will be used for the autobaud function on the RCLK pin
(for example, a 1.8432 MHz clock for 115.2K). The clock that will be used for the SCC trans-
mission can be provided to the BRG from the system clock or on TIN1.The TIN1 and RCLK1
pins can be tied together externally. After the first two characters have been received and
character length and parity determined, the host programs the DSR to $FFFF, enables the
transmitter (by setting ENT), and programs the transmit character descriptor (overlays CON-
TROL Character 8). The host is interrupted after each character is transmitted.
For modem applications with the MC68LC302, SCC2 will be used as the DTE interface and
autobauding to the DTE baud rate will often be required. If use of the smart echo feature is
desired, the receive clock can be provided by the baud rate generator 2 (BRG2) internally
by resetting the RCS bit in the SCON2 register to zero. The separate transmit clock can be
provided externally to the TCLK2 pin through a hardwire connection. The TCS bit in the
SCON2 register should be set to one to enable the external clock source. After autobauding
is complete, both the transmit and receive clock sources can be derived internally from
BRG2 and the external pin connected to TCLK2 should be three stated to assure that it does
not contend with the TCLK2 pin.
4.3.9.3 AUTOBAUD PARAMETER RAM. When configured to operate in the autobaud
mode, the IMP overlays some entries of the UART-specific parameter RAM as illustrated in
Table 4-3.
相关PDF资料 |
PDF描述 |
|---|---|
| MC68HC11KA1VFN4 | 8-BIT, EEPROM, 4 MHz, MICROCONTROLLER, PQCC68 |
| MC68HC11KA3MFN4 | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQCC68 |
| MC68B09ECP | 8-BIT, 2 MHz, MICROPROCESSOR, PDIP40 |
| M38B59EF-XXXFP | 8-BIT, OTPROM, 4.2 MHz, MICROCONTROLLER, PQFP80 |
| M37774M9XXXGP | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC68LC302PU16CT | 功能描述:IC MPU MULTI PROTOCOL 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 |
| MC68LC302PU16VCT | 功能描述:IC MPU NETWORK 16MHZ 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 |
| MC68LC302PU20CT | 功能描述:微处理器 - MPU 20MHz 2MIPS 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 |
| MC68LC302PU20VCT | 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 |
| MC68LC302PU25CT | 功能描述:微处理器 - MPU 25MHz 2.5MIPS 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 |
发布紧急采购，3分钟左右您将得到回复。