- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69025 > MC68328PV (MOTOROLA INC) MICROCONTROLLER, PQFP144 PDF資料下載
參數(shù)資料
| 型號(hào)： | MC68328PV |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MICROCONTROLLER, PQFP144 |
| 封裝： | PLASTIC, TQFP-144 |
| 文件頁(yè)數(shù)： | 37/198頁(yè) |
| 文件大?。?/td> | 551K |
| 代理商： | MC68328PV |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)當(dāng)前第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)第151頁(yè)第152頁(yè)第153頁(yè)第154頁(yè)第155頁(yè)第156頁(yè)第157頁(yè)第158頁(yè)第159頁(yè)第160頁(yè)第161頁(yè)第162頁(yè)第163頁(yè)第164頁(yè)第165頁(yè)第166頁(yè)第167頁(yè)第168頁(yè)第169頁(yè)第170頁(yè)第171頁(yè)第172頁(yè)第173頁(yè)第174頁(yè)第175頁(yè)第176頁(yè)第177頁(yè)第178頁(yè)第179頁(yè)第180頁(yè)第181頁(yè)第182頁(yè)第183頁(yè)第184頁(yè)第185頁(yè)第186頁(yè)第187頁(yè)第188頁(yè)第189頁(yè)第190頁(yè)第191頁(yè)第192頁(yè)第193頁(yè)第194頁(yè)第195頁(yè)第196頁(yè)第197頁(yè)第198頁(yè)
Universal Asynchronous Receiver/Transmitter
11-4
MC68328 USER’S MANUAL 12/9/97
MOTOROLA
UART
11
PRELIMINARY
The UART module is easy to use from both a hardware and a software perspective. Five
working registers provide all of the status and control functions and they are optimized for a
16-bit bus. For example, all status bits associated with the received data are available along
with the data byte in a single 16-bit read. All register bits are readable and most are
read/write.
The modem control signals are flexible. CTS is an input that can provide hardware
flow-control to the transmitter or it can serve as a general-purpose input. A maskable
interrupt is posted on each transition of this signal. RTS is an output from the receiver that
indicates that the receiver has space in the FIFO for data. This bit can be configured as a
general-purpose output. A GPIO pin is provided that can bring an external bit-clock into the
module. It can also serve as a general-purpose input with a maskable interrupt posted on
each transition. It can be configured as an output that provides a bit clock or a signal under
software control. The UART module consists of a transmitter, a reciever, a baud rate
generator, and an MPU interface.
11.3.1 Transmitter
The transmitter accepts a character (a byte) from the MPU bus and transmits it serially.
While the FIFO is empty, the transmitter outputs continuous idle (1 in NRZ mode and 0 in
infra-red mode). When a character is available for transmission, the START, STOP, and
PARITY (if enabled) bits are added to the character and it is serially shifted at the selected
bit rate. The transmitter posts a maskable interrupt when it needs more data from the CPU.
Three interrupts are available. If you want to take full advantage of the 8-byte FIFO, the FIFO
empty interrupt should be enabled. In the interrupt service routine, the FIFO should be
interrogated after each byte is loaded. If space is available (the TX AVAIL bit is set), more
data will be loaded into the FIFO. The transmitter will not generate another interrupt until the
FIFO has completely emptied. If you have a system that has a large interrupt service
latency, use the FIFO half interrupt. In this case, the transmitter generates an interrupt when
the FIFO occupancy is less than 4 bytes. If the FIFO is not needed, use the TX avail
interrupt. An interrupt will be generated whenever at least one space is available in the FIFO.
CTS can control the serial data flow. If CTS is negated (high), the transmitter finishes
sending the character in progress (if any), then waits for CTS to again become asserted
(low) for the next transmission. Set the SEND BREAK bit in the UART transmitter register
to generate a break character (continuous 0s). Your software must know the baud rate. The
SEND BREAK bit must be asserted for a sufficient amount of time to generate a valid break
character. You can generate parity errors for debugging purposes. The transmitter operates
from the 1x clock provided by the baud rate generator.
While the infra-red interface is enabled, the transmitter produces a pulse that is 3/16 of a bit
time for each 0 bit that is sent. The TXD port directly interfaces with popular infra-red
transceivers.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68330FE25 | 32-BIT, 25.16 MHz, MICROPROCESSOR, PQFP132 |
| MC68330FE8V | 32-BIT, 8.39 MHz, MICROPROCESSOR, PQFP132 |
| MC68330CFE8V | 32-BIT, 8.39 MHz, MICROPROCESSOR, PQFP132 |
| MC68330FE16 | 32-BIT, 16.78 MHz, MICROPROCESSOR, PQFP132 |
| MC68332ACFV25 | 32-BIT, 25 MHz, MICROCONTROLLER, PQFP144 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68328UM | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Integrated Portable System Processor-DragonBall |
| MC68330 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated CPU32 Processor |
| MC68330CFE16 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated CPU32 Processor |
| MC68330CFE8V | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated CPU32 Processor |
| MC68330CFG16 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated CPU32 Processor |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。