参数资料
型号: AT89LP428-20AU
厂商: Atmel
文件页数: 149/149页
文件大小: 0K
描述: MCU 8051 4K FLASH SPI 32TQFP
产品培训模块: MCU Product Line Introduction
标准包装: 250
系列: 89LP
核心处理器: 8051
芯体尺寸: 8-位
速度: 20MHz
连通性: SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 30
程序存储器容量: 4KB(4K x 8)
程序存储器类型: 闪存
EEPROM 大小: 512 x 8
RAM 容量: 768 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: 32-TQFP
包装: 托盘
99
3654A–MICRO–8/09
AT89LP428/828
interrupt flag are not guaranteed to be stable for 10 s. The corresponding comparator interrupt
should not be enabled during that time, and the comparator interrupt flag must be cleared before
the interrupt is enabled in order to prevent an immediate interrupt service. Before enabling the
comparators, the analog inputs should be tristated by putting P2.4, P2.5, P2.6 and P2.7 into
Figure 18-1. Dual Comparator Block Diagram
Each comparator may be configured to cause an interrupt under a variety of output value condi-
tions by setting the CMx
2-0 bits in ACSRx. The comparator interrupt flags CFx in ACSRx are set
whenever the comparator outputs match the conditions specified by CMx
2-0. The flags may be
polled by software or may be used to generate an interrupt and must be cleared by software.
Both comparators share a common interrupt vector. If both comparators are enabled, the user
needs to read the flags after entering the interrupt service routine to determine which compara-
tor caused the interrupt.
The CAC
1-0 and CBC1-0 bits in AREF control when the comparator interrupts sample the com-
parator outputs. Normally, the outputs are sampled every clock system; however, the outputs
may also be sampled whenever Timer 0, Timer 1 or Timer 2 overflows. These settings allow the
comparators to be sampled at a specific time or to reduce the number of comparator events
seen by the system when using level sensitive modes. The comparators will continue to function
during Idle mode. If this is not the desired behavior, the comparators should be disabled before
entering Idle. The comparators are always disabled during Power-down mode.
A
B
(P2.5) AIN1
(P2.6) AIN2
(P2.4) AIN0
(P2.7) AIN3
11
10
01
00
11
10
01
00
RFB1
RFB0
RFA1
RFA0
11
10
01
00
11
10
01
00
CSB0
CSB1
CSA0
CSA1
CMPB (P4.7)
CMPA (P4.6)
CMB0
CMB1
CMB2
CMA0
CMA1
CMA2
CFB
CFA
EC
Interrupt
VAREF
VAREF-Δ
VAREF+Δ
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参数描述
AT89LP428-20JU 功能描述:8位微控制器 -MCU SingleCycle 8051 4K ISP Flash 2.4V 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
AT89LP428-20MH 功能描述:8位微控制器 -MCU SingleCycle 8051 4K ISP Flash 2.4V 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
AT89LP428-20PU 功能描述:8位微控制器 -MCU SingleCycle 8051 4K ISP Flash 2.4V 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
AT89LP51-20AU 功能描述:8位微控制器 -MCU Single Cycle 8051 4K ISP FL 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
AT89LP51-20JU 功能描述:8位微控制器 -MCU Single Cycle 8051 4K ISP FL 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