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参数资料
| 型号： | DS80C323-MCD |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Microcontroller |
| 英文描述： | 8-BIT, MROM, 18 MHz, MICROCONTROLLER, PDIP40 |
| 封装： | 0.600 INCH, PLASTIC, DIP-40 |
| 文件页数： | 8/38页 |
| 文件大小： | 694K |
| 代理商： | DS80C323-MCD |
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DS80C320/DS80C323 High-Speed/Low-Power Microcontrollers
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a 25MHz crystal frequency. Note that once the counter chain has reached a conclusion, the optional
interrupt is generated. Regardless of whether the user enables this interrupt, there are then 512 clocks left
until a reset occurs. There are 5 control bits in special function registers that affect the Watchdog Timer
and two status flags that report to the user. The Reset Watchdog Timer bit (WDCON.0) should be
asserted prior to modifying the Watchdog Timer Mode Select bits (WD1, WD0) to avoid corruption of
the watchdog count.
WDIF (WDCON.3) is the interrupt flag that is set when there are 512 clocks remaining until a reset
occurs. WTRF (WDCON.2) is the flag that is set when a Watchdog reset has occurred. This allows the
application software to determine the source of a reset.
Setting the EWT (WDCON.1) bit enables the Watchdog Timer. The bit is protected by timed access.
Setting the RWT (WDCON.0) bit restarts the Watchdog Timer for another full interval. Application
software must set this bit prior to the timeout. As mentioned previously, WD1 and 0 (CKCON .7 and 6)
select the timeout. Finally, the Watchdog Interrupt is enabled using EWDI (EIE.4).
INTERRUPTS
The DS80C320/DS80C323 provide 13 sources of interrupt with three priority levels. The Power-fail
Interrupt (PFI), if enabled, always has the highest priority. There are two remaining user-selectable
priorities: high and low. If two interrupts that have the same priority occur simultaneously, the natural
precedence given in Table 4 determines which is acted upon. Except for the PFI, all interrupts that are
new to the 8051 family have a lower natural priority than the originals.
Table 4. Interrupt Priority
NAME
FUNCTION
VECTOR
NATURAL
PRIORITY
OLD/NEW
PFI
Power-Fail Interrupt
33h j
1
New
INT0
External Interrupt 0
03h
2
Old
TF0
Timer 0
0Bh
3
Old
INT1
External Interrupt 1
13h
4
Old
TF1
Timer 1
1Bh
5
Old
SCON0
TI0 or RI0 from Serial Port 0
23h
6
Old
TF2
Timer 2
2Bh
7
Old
SCON1
TI1 or RI1 from Serial Port 1
3Bh
8
New
INT2
External Interrupt 2
43h
9
New
INT3
External Interrupt 3
4Bh
10
New
INT4
External Interrupt 4
53h
11
New
INT5
External Interrupt 5
5Bh
12
New
WDTI
Watchdog Timeout Interrupt
63h
13
New
相关PDF资料 |
PDF描述 |
|---|---|
| DS80C320-QNL | 8-BIT, MROM, 33 MHz, MICROCONTROLLER, PQCC44 |
| DS80C320-MCL | 8-BIT, MROM, 33 MHz, MICROCONTROLLER, PDIP40 |
| DS80C323-ECD | 8-BIT, MROM, 18 MHz, MICROCONTROLLER, PQFP44 |
| DS80C320-QCL | 8-BIT, MROM, 33 MHz, MICROCONTROLLER, PQCC44 |
| DS80C320-MNL | 8-BIT, MROM, 33 MHz, MICROCONTROLLER, PDIP40 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS80C323-MCD+ | 功能描述:8位微控制器 -MCU High-Speed Low-Power RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| DS80C323MCG | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microprocessor |
| DS80C323-MCG | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:High-Speed Microcontroller User Guide |
| DS80C323-MCL | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:High-Speed Microcontroller User Guide |
| DS80C323-MCR | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:High-Speed Microcontroller User Guide |
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