參數(shù)資料
型號： DS89C440-QNG
廠商： Maxim Integrated Products
文件頁數(shù)： 30/46頁
文件大小： 0K
描述： IC MCU FLASH 32KB 25MHZ 44-PLCC
標準包裝： 26
系列： 89C
核心處理器： 8051
芯體尺寸： 8-位
速度： 25MHz
連通性： EBI/EMI，SIO，UART/USART
外圍設備： 電源故障復位，WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 32KB（32K x 8）
程序存儲器類型： 閃存
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 44-LCC（J 形引線）
包裝： 管件
DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
36 of 46
Interrupt Priority
There are five levels of interrupt priority: Level 4 to 0. The highest interrupt priority is level 4, which is reserved for
the power-fail interrupt. All other interrupts have individual priority bits in the interrupt priority registers to allow each
interrupt to be assigned a priority level from 3 to 0. The power-fail interrupt always has the highest priority if it is
enabled. All interrupts also have a natural hierarchy. In this manner, when a set of interrupts has been assigned the
same priority, a second hierarchy determines which interrupt is allowed to take precedence. The natural hierarchy
is determined by analyzing potential interrupts in a sequential manner with the order listed in Table 11.
The processor indicates that an interrupt condition occurred by setting the respective flag bit. This bit is set
regardless of whether the interrupt is enabled or disabled. Unless marked in Table 11, all these flags must be
cleared by software.
Table 11. Interrupt Summary
INTERRUPT
VECTOR
NATURAL ORDER
FLAG
ENABLE
PRIORITY CONTROL
Power Fail
33h
0 (Highest)
PFI (WDCON.4)
EPFI(WDCON.5)
N/A
External Interrupt 0
03h
1
IE0 (TCON.1) (Note 1)
EX0 (IE.0)
LPX0 (IP0.0);
MPX0 (IP1.0)
Timer 0 Overflow
0Bh
2
TF0 (TCON.5) (Note 2)
ET0 (IE.1)
LPT0 (IP0.1);
MPT0 (IP1.1)
External Interrupt 1
13h
3
IE1 (TCON.3) (Note 1)
EX1 (IE.2)
LPX1 (IP0.2);
MPX1 (IP1.2)
Timer 1 Overflow
1Bh
4
TF1 (TCON.7) (Note 2)
ET1 (IE.3)
LPT1 (IP0.3);
MPT1 (IP1.3)
Serial Port 0
23h
5
RI_0 (SCON0.0);
TI_0 (SCON0.1)
ES0 (IE.4)
LPS0 (IP0.4);
MPS0 (IP1.4)
Timer 2 Overflow
2Bh
6
TF2 (T2CON.7);
EXF2 (T2CON.6)
ET2 (IE.5)
LPT2 (IP0.5);
MPT2 (IP1.5)
Serial Port 1
3Bh
7
RI_1 (SCON1.0);
TI_1 (SCON1.1)
ES1 (IE.6)
LPS1 (IP0.6);
MPS1 (IP1.6)
External Interrupt 2
43h
8
IE2 (EXIF.4)
EX2 (EIE.0)
LPX2 (EIP0.0);
MPX2 (EIP1.0)
External Interrupt 3
4Bh
9
IE3 (EXIF.5)
EX3 (EIE.1)
LPX3 (EIP0.1);
MPX3 (EIP1.1)
External Interrupt 4
53h
10
IE4 (EXIF.6)
EX4 (EIE.2)
LPX4 (EIP0.2);
MPX4 (EIP1.2)
External Interrupt 5
5Bh
11
IE5 (EXIF.7)
EX5 (EIE.3)
LPX5 (EIP0.3);
MPX5 (EIP1.3)
Watchdog
63h
12 (Lowest)
WDIF (WDCON.3)
EWDI (EIE.4)
LPWDI (EIP0.4);
MPWDI (EIP1.4)
Note 1: If the interrupt is edge triggered, the flag is cleared automatically by hardware when the service routine is vectored to. If the interrupt
is level triggered, the flag follows the state of the pin.
Note 2: The flag is cleared automatically by hardware when the service routine is vectored to.
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DS89C440-QNL 功能描述:IC MCU FLASH 32KB 33MHZ 44-PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:89C 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件
DS89C440-QNL+ 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Ultra-High-Speed Flash Microcontrollers
DS89C440-XXX 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Ultra-High-Speed Flash Microcontrollers
DS89C450 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Ultra-High-Speed Flash Microcontrollers
DS89C450+ENG 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC 64KB FLASH 5V 44TQFP - Trays
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