参数资料
| 型号： | P87LPC764BN,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 10/60页 |
| 文件大小： | 0K |
| 描述： | IC 80C51 MCU 4K OTP 20-DIP |
| 产品培训模块： | Migrating from 8/16-Bit MCUs to 32-Bit ARMs |
| 标准包装： | 18 |
| 系列： | LPC700 |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 20MHz |
| 连通性： | I²C，UART/USART |
| 外围设备： | 欠压检测/复位，LED，POR，WDT |
| 输入/输出数： | 18 |
| 程序存储器容量： | 4KB（4K x 8） |
| 程序存储器类型： | OTP |
| RAM 容量： | 128 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 6 V |
| 振荡器型： | 内部 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 20-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 产品目录页面： | 706 (CN2011-ZH PDF) |
| 其它名称： | 568-1017-5 935263359112 P87LPC764BN |
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Philips Semiconductors
Product data
P87LPC764
Low power, low price, low pin count (20 pin)
microcontroller with 4 kbyte OTP
2003 Sep 03
17
External Interrupt Inputs
The P87LPC764 has two individual interrupt inputs as well as the
Keyboard Interrupt function. The latter is described separately
elsewhere in this section. The two interrupt inputs are identical to
those present on the standard 80C51 microcontroller.
The external sources can be programmed to be level-activated or
transition-activated by setting or clearing bit IT1 or IT0 in Register
TCON. If ITn = 0, external interrupt n is triggered by a detected low
at the INTn pin. If ITn = 1, external interrupt n is edge triggered. In
this mode if successive samples of the INTn pin show a high in one
cycle and a low in the next cycle, interrupt request flag IEn in TCON
is set, causing an interrupt request.
Since the external interrupt pins are sampled once each machine
cycle, an input high or low should hold for at least 6 CPU Clocks to
ensure proper sampling. If the external interrupt is
transition-activated, the external source has to hold the request pin
high for at least one machine cycle, and then hold it low for at least
one machine cycle. This is to ensure that the transition is seen and
that interrupt request flag IEn is set. IEn is automatically cleared by
the CPU when the service routine is called.
If the external interrupt is level-activated, the external source must
hold the request active until the requested interrupt is actually
generated. If the external interrupt is still asserted when the interrupt
service routine is completed another interrupt will be generated. It is
not necessary to clear the interrupt flag IEn when the interrupt is
level sensitive, it simply tracks the input pin level.
If an external interrupt is enabled when the P87LPC764 is put into
Power Down or Idle mode, the interrupt will cause the processor to
wake up and resume operation. Refer to the section on Power
Reduction Modes for details.
SU01753
WAKEUP
(IF IN POWER
DOWN)
EA
(FROM IEN0
REGISTER)
INTERRUPT
TO CPU
IE0
EX0
IE1
EX1
BOF
EBO
KBF
EKB
CM2
EC2
WDT
EWD
CM1
EC1
TF0
ET0
TF1
ET1
RI + TI
ES
ATN
EI2
Figure 9. Interrupt Sources, Interrupt Enables, and Power Down Wakeup Sources
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相关代理商/技术参数 |
参数描述 |
|---|---|
| P87LPC764FD | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low power, low price, low pin count 20 pin microcontroller with 4 kbyte OTP |
| P87LPC764FD,512 | 功能描述:8位微控制器 -MCU 4K/128 OTP 2.7-6V EXT SO20 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 |
| P87LPC764FD512 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP Semiconductors 功能描述: |
| P87LPC764FDH | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low power, low price, low pin count (20 pin) microcontroller with 4 kbyte OTP |
| P87LPC764FDH,512 | 功能描述:8位微控制器 -MCU 14 PIN MCU 1KBYTE OTP 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 |
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