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參數(shù)資料
| 型號： | DS87C550 |
| 英文描述： | EPROM High-Speed Micro with A/D and PWM |
| 中文描述： | 存儲器高速微與A / D及PWM |
| 文件頁數(shù)： | 30/50頁 |
| 文件大小： | 763K |
| 代理商： | DS87C550 |
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DS87C550
30 of 50
INTERRUPTS
The DS87C550 provides 16 interrupt sources with three priority levels. The Power-fail Interrupt (PFI) has
the highest priority. All interrupts, with the exception of the Power-fail Interrupt, are controlled by a
series combination of individual enable bits and a global interrupt enable EA (IE.7). Setting EA to a 1
allows individual interrupts to be enabled. Clearing EA disables all interrupts regardless of their
individual enable settings.
The three available priority levels are low, high, and highest. The highest priority level is reserved for the
Power-Fail Interrupt only. All other interrupt priority levels have individual priority bits that when set to a
1 establish the particular interrupt as high priority. In addition to the user selectable priorities, each
interrupt also has an inherent or “natural priority”. Given that all interrupt sources maintain the default
low priority, the natural priority determines the priority of simultaneously occurring interrupts. The
available interrupt sources, their flags, their enables their natural priority, and their available priority
selection bits are identified in Table 9.
INTERRUPT SOURCES AND PRIORITIES
Table 9
NAME
PFI
DESCRIPTION
Power Fail Interrupt
External Interrupt 0
TI1 or RI1 from serial
port 1
A/D Converter
Interrupt
Timer 0
External Interrupt 2 or
Capture 0
Compare Match 0
External Interrupt 1
External Interrupt 3 or
Capture 1
Compare Match 1
Timer 1
External Interrupt 4 or
Capture 2
Compare Match 2
TI0 or RI0 from serial
port 0
External Interrupt 5 or
Capture 3
VECTOR
33h
03h
NATURAL
PRIORITY
0
1
FLAG
BIT
ENABLE
BIT
EPFI(WDCON.5)
EX0(IE.0)
PRIORITY
CONTROL BIT
N/A
PX0(IP.0)
PFI(WDCON.4)
IEO(TCON.1)
RI_1(SCON1.0)
TI_1(SCON1.1)
INT0
SCON1
0Bh
2
ES1(IE.5)
PS1(IP.5)
A/D
13h
3
EOC(ADCON1.6)
EAD(IE.6)
PAD(IP.6)
TF0
1Bh
4
TF0(TCON.5)
ET0(IE.1)
PT0(IP.1)
INT2/CF0
23h
5
IE2/CF0(T2IR.0)
EX2/EC0(EIE.0)
PX2/PC0(EIP.0)
CM0F
2Bh
3Bh
6
7
CM0F(T2IR.4)
IE1(TCON.3)
ECM0(EIE.4)
EX1(IE.2)
PCM0(EIP.4)
PX1(IP.2)
INT1
INT3/CF1
43h
8
IE3/CF1(T2IR.1)
EX3/EC1(EIE.1)
PX3/PC1(EIP.1)
CM1F
TF1
4Bh
53h
9
10
CM1F(T2IR.5)
TF1(TCON.7)
ECM1(EIE.5)
ET1(IE.3)
PCM1(EIP.5)
PT1(IP.3)
INT4/CF2
5Bh
11
IE4/CF2(T2IR.2)
EX4/EC2(EIE.2)
PX4/PC2(EIP.2)
CM2F
63h
12
CM2F(T2IR.6)
RI_0(SCON0.0)
TI_0(SCON0.1)
ECM2(EIE.6)
PCM2(EIP.6)
SCON0
6Bh
13
ES0(IE.4)
PS0(IP.4)
INT5/CF3
73h
14
IE5/CF3(T2IR.3)
EX5/EC3(EIE.3)
PX5/PC3(EIP.3)
TF2
Timer 2
7Bh
15
TF2(TCON.7)
TF2B(T2SEL.4)
ET2(EIE.7)
PT2(EIP.7)
EPROM PROGRAMMING
The DS87C550 follows 8-kbyte EPROM standards for the 8051 family. It is available in a UV erasable,
ceramic windowed package and in plastic packages for one-time user-programmable versions. The part
has unique signature information so programmers can support its specific EPROM options.
PROGRAMMING PROCEDURE
The DS87C550 should run from a clock speed between 4 and 6 MHz when programmed. The
programming fixture should apply address information for each byte to the address lines and the data
value to the data lines. The control signals must be manipulated as shown in Table 10. The diagram in
Figure 5 shows the expected electrical connection for programming. Note that the programmer must
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS87C550-QCL | EPROM High-Speed Micro with A/D and PWM |
| DS87C550-FCL | EPROM High-Speed Micro with A/D and PWM |
| DS87C550-FNL | EPROM High-Speed Micro with A/D and PWM |
| DS87C550-KCL | EPROM High-Speed Micro with A/D and PWM |
| DS87C550-QNL | EPROM High-Speed Micro with A/D and PWM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS87C550-FCL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-FNL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-KCL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-QCL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-QCL+ | 功能描述:IC MCU EPROM ADC/PWM HS 68-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:87C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(shè)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 |
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