- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371046 > MC68C912B32CFU8 (MOTOROLA INC) 16-Bit Microcontroller PDF資料下載
參數(shù)資料
| 型號(hào)： | MC68C912B32CFU8 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-Bit Microcontroller |
| 中文描述： | 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | QFP-80 |
| 文件頁(yè)數(shù)： | 57/128頁(yè) |
| 文件大?。?/td> | 748K |
| 代理商： | MC68C912B32CFU8 |
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)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)當(dāng)前第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)
MC68HC912B32
MC68HC912B32TS/D
MOTOROLA
57
10 Clock Functions
Clock generation circuitry generates the internal and external E-clock signals as well as internal clock
signals used by the CPU and on-chip peripherals. A clock monitor circuit, a computer operating properly
(COP) watchdog circuit, and a periodic interrupt circuit are also incorporated into the MC68HC912B32.
10.1 Clock Sources
A compatible external clock signal can be applied to the EXTAL pin or the MCU can generate a clock
signal using an on-chip oscillator circuit and an external crystal or ceramic resonator. The MCU uses
three types of internal clock signals derived from the primary clock signal: T clocks, E clock, and P clock.
The T clocks are used by the CPU. The E and P clocks are used by the bus interfaces, BDM, SPI, and
ATD. The P clock also drives on-chip modules such as the timer chain, SCI, RTI, COP, and restart-from-
stop delay time.
Figure 10
shows clock timing relationships.
Figure 10 Internal Clock Relationships
10.2 Computer Operating Properly (COP)
The COP or watchdog timer is an added check that a program is running and sequencing properly.
When the COP is being used, software is responsible for keeping a free-running watchdog timer from
timing out. If the watchdog timer times out it is an indication that the software is no longer being execut-
ed in the intended sequence; thus a system reset is initiated. Three control bits allow selection of seven
COP time-out periods or COP disable. When COP is enabled, sometime during the selected period the
program must write $55 and $AA (in this order) to the COPRST register. If the program fails to do this
the part will reset. If any value other than $55 or $AA is written to COPRST, the part is reset.
10.3 Real-Time Interrupt
There is a real-time (periodic) interrupt available to the user. This interrupt will occur at one of seven
selected rates. An interrupt flag and an interrupt enable bit are associated with this function. There are
three bits for the rate select.
10.4 Clock Monitor
The clock monitor circuit is based on an internal resistor-capacitor (RC) time delay. If no MCU clock
edges are detected within this RC time delay, the clock monitor can optionally generate a system reset.
The clock monitor function is enabled/disabled by the CME control bit in the COPCTL register. This
time-out is based on an RC delay so that the clock monitor can operate without any MCU clocks.
Clock monitor time-outs are shown in
Table 19
.
T1CLK
T2CLK
T3CLK
T4CLK
INT ECLK
PCLK
HC12B32 CLOCK RELATIONS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68CK338 | Highly Integrated, Low-Power, 32-Bit Microcontroller |
| MC68EC060 | 32-Bit Microprocessors.(32位微處理器) |
| MC68EN360RC25V | QUad Integrated Communications Controller Users Manual |
| MC68EN360CFE25 | QUad Integrated Communications Controller Users Manual |
| MC68EN360FE25 | AC 4C 4#12 PIN PLUG 023 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68C912B32FU8 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-Bit Microcontroller |
| MC68CK16Z1 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series |
| MC68CK16Z1CAG16 | 功能描述:16位微控制器 - MCU 16BIT 1KRAM 32KHZ CRYSTAL RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| MC68CK16Z1CAG16 | 制造商:Freescale Semiconductor 功能描述:Microcontroller |
| MC68CK16Z1CFC16 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。