- 您现在的位置：买卖IC网 > PDF目录359091 > M68HC705UGANG (飞思卡尔半导体(中国)有限公司) High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit PDF资料下载
参数资料
| 型号： | M68HC705UGANG |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 英文描述： | High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit |
| 中文描述： | 高密度互补金属氧化物半导体（HCMOS）微控制器 |
| 文件页数： | 37/112页 |
| 文件大小： | 809K |
| 代理商： | M68HC705UGANG |
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页当前第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
MC68HC05BD3
4-5
RESETS AND INTERRUPTS
4
4.2.2
Maskable Hardware Interrupts
If the interrupt mask bit (I-bit) of the CCR is set, all maskable interrupts (internal and external) are
masked. Clearing the I-bit allows interrupt processing to occur.
Note:
The internal interrupt latch is cleared in the first part of the interrupt service routine;
therefore, one external interrupt pulse could be latched and serviced as soon as the
I-bit is cleared.
4.2.2.1
External Interrupt (IRQ)
The external interrupt IRQ can be software configured for “negative-edge” or “negative-edge and
level” sensitive triggering by the IRQN bit in the Multi-Function TImer Control and Status
register.
IRQN
1 (set)
–
Negative edge triggering for IRQ only
0 (clear) –
Level and negative edge triggering for IRQ
When the signal of the external interrupt pin, IRQ, satisfies the condition selected, an external
interrupt occurs. The actual processor interrupt is generated only if the interrupt mask bit of the
condition code register is also cleared. When the interrupt is recognized, the current state of the
processor is pushed onto the stack and the interrupt mask bit in the condition code register is set.
This masks further interrupts until the present one is serviced. The service routine address is
specified by the contents $3FFA & $3FFB.
The interrupt logic recognizes negative edge transitions and pulses (special case of negative
edges) on the external interrupt line. Figure 4-3 shows both a block diagram and timing for the
interrupt line (IRQ) to the processor. The first method is used if pulses on the interrupt line are
spaced far enough apart to be serviced. The minimum time between pulses is equal to the number
of cycles required to execute the interrupt service routine plus 21 cycles. Once a pulse occurs, the
next pulse should not occur until the MCU software has exited the routine (an RTI occurs). The
second configuration shows several interrupt lines wired-OR to perform the interrupt at the
processor. Thus, if the interrupt lines remain low after servicing one interrupt, the next interrupt is
recognized.
Note:
The internal interrupt latch is cleared in the first part of the service routine; therefore,
one (and only one) external interrupt pulse could be latched during t
ILIL
and serviced
as soon as the I bit is cleared.
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
MFT Control and Status
$0008
TOF
RTIF
TOFIE
RTIE
IRQN
RT1
RT0
0000 0-11
TPG
35
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
相关PDF资料 |
PDF描述 |
|---|---|
| M68TC11E20B56 | HC11 Microcontrollers |
| M68Z128W-70N1T | 3V, 1 Mbit 128Kb x8 Low Power SRAM with Output Enable |
| M68Z128WN | 3V, 1 Mbit 128Kb x8 Low Power SRAM with Output Enable |
| M68Z128W | 3V, 1 Mbit 128Kb x8 Low Power SRAM with Output Enable |
| M69AW024BL60ZB8T | 16 Mbit (1M x16) 3V Asynchronous PSRAM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M68HC705UPGMR | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit |
| M68HC705X16PGMR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| M68HC711CFD | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:CONFIG REGISTER PROGRAMMING FOR EEPROM-BASED MHC MICROCONTROLLERS |
| M68HC711CFG | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:CONFIG REGISTER PROGRAMMING FOR EEPROM-BASED MHC MICROCONTROLLERS |
| M68HC711CFG/D | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:CONFIG REGISTER PROGRAMMING FOR EEPROM-BASED MHC MICROCONTROLLERS |
发布紧急采购，3分钟左右您将得到回复。