参数资料
型号: AT89LP213-20PU
厂商: Atmel
文件页数: 31/98页
文件大小: 0K
描述: MCU 8051 2K FLASH 20MHZ 14-PDIP
产品培训模块: MCU Product Line Introduction
标准包装: 25
系列: 89LP
核心处理器: 8051
芯体尺寸: 8-位
速度: 20MHz
连通性: SPI
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 12
程序存储器容量: 2KB(2K x 8)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 2.4 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 14-DIP(0.300",7.62mm)
包装: 管件
37
3538E–MICRO–11/10
AT89LP213/214
15. External Interrupts
When the AT89LP213/214 is configured to use the internal RC Oscillator, XTAL1 and XTAL2
may be used as the INT0 and INT1 external interrupt sources. When the external clock source is
used, XTAL2 is available as INT1. Neither interrupt is available in crystal oscillator mode. The
external interrupts can be programmed to be level-activated or transition-activated by setting or
clearing bit IT1 or IT0 in Register TCON. If ITx = 0, external interrupt x is triggered by a detected
low at the INTx pin. If ITx = 1, external interrupt x is edge-triggered. In this mode if successive
samples of the INTx pin show a high in one cycle and a low in the next cycle, interrupt request
flag IEx in TCON is set. Flag bit IEx then requests the interrupt. Since the external interrupt pins
are sampled once each clock cycle, an input high or low should hold for at least 2 oscillator peri-
ods to ensure sampling. If the external interrupt is transition-activated, the external source has to
hold the request pin high for at least two clock cycles, and then hold it low for at least two clock
cycles to ensure that the transition is seen so that interrupt request flag IEx will be set. IEx will be
automatically cleared by the CPU when the service routine is called if generated in edge-trig-
gered mode. If the external interrupt is level-activated, the external source has to hold the
request active until the requested interrupt is actually generated. Then the external source must
deactivate the request before the interrupt service routine is completed, or else another interrupt
will be generated.
16. General-purpose Interrupts
The General-purpose Interrupt (GPI) function provides 8 configurable external interrupts on
Port 1. Each port pin can detect high/low levels or positive/negative edges. The GPIEN register
select which bits of Port 1 are enabled to generate an interrupt. The GPMOD and GPLS regis-
ters determine the mode for each individual pin. GPMOD selects between level-sensitive and
edge-triggered mode. GPLS selects between high/low in level mode and positive/negative in
edge mode. The pins of Port 1 are sampled every clock cycle. In level-sensitive mode, a valid
level must appear in two successive samples before generating the interrupt. In edge-triggered
mode, a transition will be detected if the value changes from one sample to the next. When an
interrupt condition on a pin is detected, and that pin is enabled, the appropriate flag in the GPIF
register is set. The flags in GPIF must be cleared by software.
.
Table 16-1.
GPMOD
– General-purpose Interrupt Mode Register
GPMOD = 9AH
Reset Value = 0000 0000B
Not Bit Addressable
GPMOD7
GPMOD6
GPMOD5
GPMOD4
GPMOD3
GPMOD2
GPMOD1
GPMOD0
Bit
7
6
543
21
0
GPMOD.x
0 = level-sensitive interrupt for P1.x
1 = edge-triggered interrupt for P1.x
相关PDF资料
PDF描述
VE-B5X-IX-F4 CONVERTER MOD DC/DC 5.2V 75W
V375A36E500BG CONVERTER MOD DC/DC 36V 500W
AT89LP214-20XU MCU 8051 2K FLASH 20MHZ 14-TSSOP
VE-B5X-IW-F2 CONVERTER MOD DC/DC 5.2V 100W
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相关代理商/技术参数
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AT89LP213-20SU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.4-5.5V 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
AT89LP213-20XU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.4-5.5V 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
AT89LP214-16XI 功能描述:8位微控制器 -MCU Microcontroller 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
AT89LP214-20PU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.4-5.5V 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
AT89LP214-20SU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.4-5.5V 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