- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371046 > MC68C912B32FU8 (MOTOROLA INC) 16-Bit Microcontroller PDF資料下載
參數(shù)資料
| 型號(hào)： | MC68C912B32FU8 |
| 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)： | 12/128頁(yè) |
| 文件大小： | 748K |
| 代理商： | MC68C912B32FU8 |
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)當(dāng)前第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)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)
MOTOROLA
12
MC68HC912B32
MC68HC912B32TS/D
3.3.3 Reset (RESET)
An active low bidirectional control signal, RESET, acts as an input to initialize the MCU to a known start-
up state. It also acts as an open-drain output to indicate that an internal failure has been detected in
either the clock monitor or COP watchdog circuit. The MCU goes into reset asynchronously and comes
out of reset synchronously. This allows the part to reach a proper reset state even if the clocks have
failed, while allowing synchronized operation when starting out of reset.
It is possible to determine whether a reset was caused by an internal source or an external source. An
internal source drives the pin low for 16 cycles; eight cycles later the pin is sampled. If the pin has re-
turned high, either the COP watchdog vector or clock monitor vector will be taken. If the pin is still low,
the external reset is determined to be active and the reset vector is taken. Hold reset low for at least 32
cycles to assure that the reset vector is taken in the event that an internal COP watchdog time-out or
clock monitor fail occurs.
3.3.4 Maskable Interrupt Request (IRQ)
The IRQ input provides a means of applying asynchronous interrupt requests to the MCU. Either falling
edge-sensitive triggering or level-sensitive triggering is program selectable (INTCR register). IRQ is al-
ways configured to level-sensitive triggering at reset. When the MCU is reset the IRQ function is
masked in the condition code register.
This pin is always an input and can always be read. In special modes it can be used to apply external
EEPROM V
PP
in support of EEPROM testing. External V
PP
is not needed for normal EEPROM program
and erase cycles. Because the IRQ pin is also used as an EEPROM programming voltage pin, there is
an internal resistive pull-up on the pin.
3.3.5 Nonmaskable Interrupt (XIRQ)
The XIRQ input provides a means of requesting a nonmaskable interrupt after reset initialization. During
reset, the X bit in the condition code register (CCR) is set and any interrupt is masked until MCU soft-
ware enables it. Because the XIRQ input is level sensitive, it can be connected to a multiple-source
wired-OR network. This pin is always an input and can always be read. There is an active pull-up on
this pin while in reset and immediately out of reset. The pull-up can be turned off by clearing PUPE in
the PUCR register. XIRQ is often used as a power loss detect interrupt.
Whenever XIRQ or IRQ are used with multiple interrupt sources (IRQ must be configured for level-sen-
sitive operation if there is more than one source of IRQ interrupt), each source must drive the interrupt
input with an open-drain type of driver to avoid contention between outputs. There must also be an in-
terlock mechanism at each interrupt source so that the source holds the interrupt line low until the MCU
recognizes and acknowledges the interrupt request. If the interrupt line is held low, the MCU will recog-
nize another interrupt as soon as the interrupt mask bit in the MCU is cleared (normally upon return from
an interrupt).
3.3.6 Mode Select (SMODN, MODA, and MODB)
The state of these pins during reset determine the MCU operating mode. After reset, MODA and MODB
can be configured as instruction queue tracking signals IPIPE0 and IPIPE1. MODA and MODB have
active pulldowns during reset.
The SMODN pin can be used as BKGD or TAGHI after reset.
3.3.7 Single-Wire Background Mode Pin (BKGD)
The BKGD pin receives and transmits serial background debugging commands. A special self-timing
protocol is used. The BKGD pin has an active pull-up when configured as input; BKGD has no pull-up
control. Refer to
16 Development Support
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68B912B32FU8 | 16-Bit Microcontroller |
| MC68C912B32CFU8 | 16-Bit Microcontroller |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| MC68CK16Z1CPV16 | 功能描述:16位微控制器 - MCU 16 Bit 16MHz 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。