- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371048 > MC68HC11A8MCFN2 (MOTOROLA INC) HCMOS Single-Chip Microcontroller PDF資料下載
參數(shù)資料
| 型號(hào)： | MC68HC11A8MCFN2 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | HCMOS Single-Chip Microcontroller |
| 中文描述： | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQCC52 |
| 封裝： | PLASTIC, LCC-52 |
| 文件頁數(shù)： | 19/158頁 |
| 文件大?。?/td> | 776K |
| 代理商： | MC68HC11A8MCFN2 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當(dāng)前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁
MC68HC11A8
TECHNICAL DATA
SIGNAL DESCRIPTIONS AND OPERATING MODES
MOTOROLA
2-3
2
2.1.4 E Clock Output (E)
This is the output connection for the internally generated E clock which can be used
as a timing reference. The frequency of the E clock output is actually one fourth that
of the input frequency at the XTAL and EXTAL pins. When the E clock output is low
an internal process is taking place and, when high, data is being accessed. The E
clock signal is halted when the MCU is in STOP mode.
2.1.5 Interrupt Request (IRQ)
The IRQ input provides a means for requesting asynchronous interrupts to the
MC68HC11A8. It is program selectable (OPTION register) with a choice of either neg-
ative edge-sensitive or level-sensitive triggering, and is always configured to level-
sensitive triggering by reset. The IRQ pin requires an external pull-up resistor to V
DD
(typically 4.7K ohm).
2.1.6 Non-Maskable Interrupt (XIRQ)
This input provides a means for requesting a non-maskable interrupt, after reset ini-
tialization. During reset, the X bit in the condition code register is set and any interrupt
is masked until MCU software enables it. The XIRQ input is level sensitive and re-
quires an external pull-up resistor to V
DD
.
2.1.7 Mode A/Load Instruction Register and Mode B/Standby Voltage (MODA/LIR,
MODB/V
STBY
)
During reset, MODA and MODB are used to select one of the four operating modes.
Refer to
Table 2-1
. Paragraph
2.2 Operating Modes
provides additional information.
After the operating mode has been selected, the LIR pin provides an open-drain output
to indicate that an instruction is starting. All instructions are made up of a series of E
clock cycles. The LIR signal goes low during the first E clock cycle of each instruction
(opcode fetch). This output is provided as an aid in program debugging.
The V
STBY
signal is used as the input for RAM standby power. When the voltage on
this pin is more than one MOS threshold (about 0.7 volts) above the V
DD
voltage, the
internal 256-byte RAM and part of the reset logic are powered from this signal rather
than the V
DD
input. This allows RAM contents to be retained without V
DD
power applied
to the MCU. Reset must be driven low before V
DD
is removed and must remain low
until V
DD
has been restored to a valid level.
Table 2-1 Operating Modes vs. MODA and MODB
MODB
1
1
0
0
MODA
0
1
0
1
Mode Selected
Single Chip
Expanded Multiplexed
Special Bootstrap
Special Test
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC11A8BCFN2 | HCMOS Single-Chip Microcontroller |
| MC68HC11A8BCFU2 | HCMOS Single-Chip Microcontroller |
| MC68HC11A8BCP2 | HCMOS Single-Chip Microcontroller |
| MC68HC11A8BMP2 | HCMOS Single-Chip Microcontroller |
| MC68HC11A8BVP2 | HCMOS Single-Chip Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC11A8P1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HC11A8TS | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-Bit Microcontrollers |
| MC68HC11A8VCFN2 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller |
| MC68HC11A8VCFU2 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller |
| MC68HC11AOFNR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。