- 您现在的位置：买卖IC网 > PDF目录69025 > MC68CK338CPV14B1 (FREESCALE SEMICONDUCTOR INC) 32-BIT, 14.4 MHz, MICROCONTROLLER, PQFP144 PDF资料下载
参数资料
| 型号： | MC68CK338CPV14B1 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 14.4 MHz, MICROCONTROLLER, PQFP144 |
| 封装： | PLASTIC, TQFP-144 |
| 文件页数： | 104/133页 |
| 文件大小： | 944K |
| 代理商： | MC68CK338CPV14B1 |
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页当前第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
MOTOROLA
MC68CK338
72
MC68CK338TS/D
5.5.4 Operating Modes
The QSPI operates in either master or slave mode. Master mode is used when the MCU originates data
transfers. Slave mode is used when an external device initiates serial transfers to the MCU through the
QSPI. Switching between the modes is controlled by MSTR in SPCR0. Before entering either mode,
appropriate QSM and QSPI registers must be properly initialized.
In master mode, the QSPI executes a queue of commands defined by control bits in each command
RAM queue entry. Chip-select pins are activated, data is transmitted from transmit RAM and received
into receive RAM.
In slave mode, operation proceeds in response to SS pin activation by an external bus master. Opera-
tion is similar to master mode, but no peripheral chip selects are generated, and the number of bits
transferred is controlled in a different manner. When the QSPI is selected, it automatically executes the
next queue transfer to exchange data with the external device correctly.
Although the QSPI inherently supports multi-master operation, no special arbitration mechanism is pro-
vided. A mode fault flag (MODF) indicates a request for SPI master arbitration. System software must
provide arbitration. Note that unlike previous SPI systems, MSTR is not cleared by a mode fault being
set, nor are the QSPI pin output drivers disabled. The QSPI and associated output drivers must be dis-
abled by clearing SPE in SPCR1.
5.6 SCI Submodule
The SCI submodule is used to communicate with external devices through an asynchronous serial bus.
The SCI is fully compatible with the SCI systems found on other Motorola MCUs, such as the M68HC11
and M68HC05 Families.
5.6.1 SCI Pins
There are two unidirectional pins associated with the SCI. The SCI controls the transmit data (TXD) pin
when enabled, whereas the receive data (RXD) pin remains a dedicated input pin to the SCI. TXD is
available as a general-purpose I/O pin when the SCI transmitter is disabled. When used for I/O, TXD
can be configured either as input or output, as determined by QSM register DDRQS.
Table 42 shows SCI pins and their functions.
5.6.2 SCI Registers
The SCI programming model includes QSM global and pin control registers, and four SCI registers.
There are two SCI control registers, one status register, and one data register. All registers can be read
or written at any time by the CPU.
Changing the value of SCI control bits during a transfer operation may disrupt operation. Before chang-
ing register values, allow the transmitter to complete the current transfer, then disable the receiver and
transmitter. Status flags in the SCSR may be cleared at any time.
Table 42 SCI Pins
Pin Names
Mnemonics
Mode
Function
Receive data
RXD
Receiver disabled
Receiver enabled
Not used
Serial data input to SCI
Transmit data
TXD
Transmitter disabled
Transmitter enabled
General-purpose I/O
Serial data output from SCI
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相关PDF资料 |
PDF描述 |
|---|---|
| MC68CK338CPV14 | 32-BIT, 14.4 MHz, MICROCONTROLLER, PQFP144 |
| MC68EN360CRC25 | 32-BIT, 25 MHz, RISC MICROCONTROLLER, CPGA241 |
| MC68F333FE | 32-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, CQFP160 |
| MC68F333FC | 32-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP160 |
| MC68HC000L12F | 16-BIT, 16.67 MHz, MICROPROCESSOR, CDIP64 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC68CM16Z1 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series |
| MC68CM16Z1CFC16 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series |
| MC68CM16Z1CPV16 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series |
| MC68E360VR25VLR2 | 功能描述:微处理器 - MPU QUICC ETHRN 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 |
| MC68E360ZP25VLR2 | 功能描述:IC MPU QUICC 32BIT 357-PBGA RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微处理器 系列:M683xx 标准包装:1 系列:MPC85xx 处理器类型:32-位 MPC85xx PowerQUICC III 特点:- 速度:1.2GHz 电压:1.1V 安装类型:表面贴装 封装/外壳:783-BBGA，FCBGA 供应商设备封装:783-FCPBGA（29x29） 包装:托盘 |
发布紧急采购，3分钟左右您将得到回复。