參數(shù)資料
型號(hào)： DS80C320-ENL
廠商： DALLAS SEMICONDUCTOR
元件分類： Microcontroller
英文描述： 8-BIT, MROM, 33 MHz, MICROCONTROLLER, PQFP44
封裝： TQFP-44
文件頁(yè)數(shù)： 7/42頁(yè)
文件大?。?/td> 736K
代理商： DS80C320-ENL
DS80C320/DS80C323
15 of 42
MHz 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
discussed below. 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 provides 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 below determines which is a acted upon. Except for the PFI, all interrupts that are new
to the 8051 family have a lower natural priority than the originals.
INTERRUPT PRIORITY Table 5
NAME
DESCRIPTION
VECTOR
NATURAL PRIORITY
OLD/NEW
PFI
Power-fail Intterupt
33h
j
1NEW
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
相關(guān)PDF資料
PDF描述
DS80C320-ENG 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP44
DS80C320-MCG 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PDIP40
DS80C320-QNG 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQCC44
DS80C320-ECG 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP44
DS80C320-FNG 8-BIT, 25 MHz, MICROCONTROLLER, PQFP44
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS80C320-ENL+ 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 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
DS80C320-ENR 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:High-Speed Microcontroller User Guide
DS80C320-FCD 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:High-Speed Microcontroller User Guide
DS80C320-FCG 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 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
DS80C320-FCG+ 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 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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