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参数资料
| 型号： | DS83C530-QNL |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Microcontroller |
| 英文描述： | 8-BIT, MROM, 33 MHz, MICROCONTROLLER, PQCC52 |
| 封装： | PLASTIC, LCC-52 |
| 文件页数： | 20/45页 |
| 文件大小： | 649K |
| 代理商： | DS83C530-QNL |
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DS87C530/DS83C530 EPROM/ROM Microcontrollers with Real-Time Clock
27 of 45
There are five control bits in special function registers that affect the Watchdog Timer and two status
flags that report to the user. WDIF (WDCON.3) is the interrupt flag that is set at timer termination when
there are 512 clocks remaining until the reset flag is set. WTRF (WDCON.2) is the flag that is set when
the timer has completely timed out. This flag is normally associated with a CPU reset and allows software
to determine the reset source. EWT (WDCON.1) is the enable for the Watchdog Timer reset function.
RWT (WDCON.0) is the bit that software uses to restart the Watchdog Timer. Setting this bit restarts the
timer for another full interval. Application software must set this bit before the timeout. Both of these bits
are protected by Timed Access discussed below. As mentioned previously, WD1 and 0 (CKCON .7 and
6) select the timeout. 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. Finally,
the user can enable the Watchdog Interrupt using EWDI (EIE.4).
INTERRUPTS
The DS87C530/DS83C530 provide 14 interrupt sources with three priority levels. The Power-Fail
Interrupt (PFI) has the highest priority. Software can assign high or low priority to other sources. All
interrupts that are new to the 8051 family, except for the PFI, have a lower natural priority than the
originals.
Table 8. Interrupt Sources and Priorities
NAME
FUNCTION
VECTOR
NATURAL
PRIORITY
8051/DALLAS
PFI
Power-Fail Interrupt
33h
1
DALLAS
INT0
External Interrupt 0
03h
2
8051
TF0
Timer 0
0Bh
3
8051
INT1
External Interrupt 1
13h
4
8051
TF1
Timer 1
1Bh
5
8051
SCON0
TI0 or RI0 from Serial Port 0
23h
6
8051
TF2
Timer 2
2Bh
7
8051
SCON1
TI1 or RI1 from Serial Port 1
3Bh
8
DALLAS
INT2
External Interrupt 2
43h
9
DALLAS
INT3
External Interrupt 3
4Bh
10
DALLAS
INT4
External Interrupt 4
53h
11
DALLAS
INT5
External Interrupt 5
5Bh
12
DALLAS
WDTI
Watchdog Timeout Interrupt
63h
13
DALLAS
RTCI
RTC Interrupt
6Bh
14
DALLAS
相关PDF资料 |
PDF描述 |
|---|---|
| DS87C530-QNL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQCC52 |
| DS83C530-QCL | 8-BIT, MROM, 33 MHz, MICROCONTROLLER, PQCC52 |
| DS87C530-KCL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, CQCC52 |
| DTA-03D-1.5-TA-P | POSITION, LINEAR SENSOR-AC, -3-3mm |
| DTA-01D-3-SA-P | POSITION, LINEAR SENSOR-AC, -1-1mm |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS83C530-QNL+ | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock |
| DS83CH20 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Peripheral (Multifunction) Controller |
| DS84 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| DS840 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| DS843 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
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