参数资料
| 型号： | P87C51RA2BA,512 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 24/67页 |
| 文件大小： | 0K |
| 描述： | IC 80C51 MCU 512 RAM 44PLCC |
| 产品培训模块： | Migrating from 8/16-Bit MCUs to 32-Bit ARMs |
| 标准包装： | 26 |
| 系列： | 87C |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 33MHz |
| 连通性： | EBI/EMI，UART/USART |
| 外围设备： | POR，PWM，WDT |
| 输入/输出数： | 32 |
| 程序存储器容量： | 16KB（16K x 8） |
| 程序存储器类型： | OTP |
| RAM 容量： | 512 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 振荡器型： | 内部 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 44-LCC（J 形引线） |
| 包装： | 管件 |
| 其它名称： | 568-7904-5 568-7904-5-ND 568-8355-5 935271889512 P87C51RA2BA P87C51RA2BA,512-ND P87C51RA2BA-ND |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页当前第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页
Philips Semiconductors
Product data
P87C51RA2/RB2/RC2/RD2
80C51 8-bit microcontroller family 8KB/16KB/32KB/64KB OTP
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
2003 Jan 24
30
Interrupt Priority Structure
The P87C51RA2/RB2/RC2/RD2 has a 7 source four-level interrupt
structure (see Table 7).
There are 3 SFRs associated with the four-level interrupt. They are
the IE, IP, and IPH. (See Figures 15, 16, and 17.) The IPH (Interrupt
Priority High) register makes the four-level interrupt structure
possible. The IPH is located at SFR address B7H. The structure of
the IPH register and a description of its bits is shown in Figure 17.
The function of the IPH SFR, when combined with the IP SFR,
determines the priority of each interrupt. The priority of each
interrupt is determined as shown in the following table:
PRIORITY BITS
INTERRUPT PRIORITY LEVEL
IPH.x
IP.x
INTERRUPT PRIORITY LEVEL
0
Level 0 (lowest priority)
0
1
Level 1
1
0
Level 2
1
Level 3 (highest priority)
The priority scheme for servicing the interrupts is the same as that
for the 80C51, except there are four interrupt levels rather than two
as on the 80C51. An interrupt will be serviced as long as an interrupt
of equal or higher priority is not already being serviced. If an
interrupt of equal or higher level priority is being serviced, the new
interrupt will wait until it is finished before being serviced. If a lower
priority level interrupt is being serviced, it will be stopped and the
new interrupt serviced. When the new interrupt is finished, the lower
priority level interrupt that was stopped will be completed.
Table 7.
Interrupt Table
SOURCE
POLLING PRIORITY
REQUEST BITS
HARDWARE CLEAR?
VECTOR ADDRESS
X0
1
IE0
N (L)1
Y (T)2
03H
T0
2
TP0
Y
0BH
X1
3
IE1
N (L)
Y (T)
13H
T1
4
TF1
Y
1BH
PCA
5
CF, CCFn
n = 0–4
N
33H
SP
6
RI, TI
N
23H
T2
7
TF2, EXF2
N
2BH
NOTES:
1. L = Level activated
2. T = Transition activated
EX0
IE (0A8H)
Enable Bit = 1 enables the interrupt.
Enable Bit = 0 disables it.
BIT
SYMBOL
FUNCTION
IE.7
EA
Global disable bit. If EA = 0, all interrupts are disabled. If EA = 1, each interrupt can be individually
enabled or disabled by setting or clearing its enable bit.
IE.6
EC
PCA interrupt enable bit
IE.5
ET2
Timer 2 interrupt enable bit.
IE.4
ES
Serial Port interrupt enable bit.
IE.3
ET1
Timer 1 interrupt enable bit.
IE.2
EX1
External interrupt 1 enable bit.
IE.1
ET0
Timer 0 interrupt enable bit.
IE.0
EX0
External interrupt 0 enable bit.
SU01290
ET0
EX1
ET1
ES
ET2
EC
EA
0
1
2
3
4
5
6
7
Figure 15. IE Registers
相关PDF资料 |
PDF描述 |
|---|---|
| MC68HC11F1CFN3R2 | IC MCU 512 EEPROM 3MHZ 68-PLCC |
| EFM32G842F128 | IC MCU 32BIT 128KB FLASH 64LQFP |
| LPC11U24FET48/301, | MCU USB 48TFBGA |
| 5787761-6 | CONN RCPT USB TYPE A PCB R/A |
| 5787761-3 | CONN RCPT USB TYPE A PCB R/A |
相关代理商/技术参数 |
参数描述 |
|---|---|
| P87C51RA2BBD | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family |
| P87C51RA2FA | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family |
| P87C51RA2FA,512 | 功能描述:8位微控制器 -MCU 8B MCU 8K-64K/256-1K 2.7-5.5V 33MHZ 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 |
| P87C51RA2FA512 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| P87C51RB+4A | 制造商:PHILIPS-SEMI 功能描述: 制造商:NXP Semiconductors 功能描述:MCU 8-bit 8XC51 80C51 CISC 16KB EPROM 3.3V/5V 44-Pin PLCC |
发布紧急采购，3分钟左右您将得到回复。