参数资料
型号: AT89LP828-20JU
厂商: Atmel
文件页数: 128/149页
文件大小: 0K
描述: MCU 8051 8K FLASH SPI 32PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 32
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: 8KB(8K x 8)
程序存储器类型: 闪存
EEPROM 大小: 1K 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-LCC(J 形引线)
包装: 管件
8
3654A–MICRO–8/09
AT89LP428/828
2.2.6
Serial Port
The baud rate of the UART in Mode 0 defaults to 1/4 the clock frequency, compared to 1/12 the
clock frequency in the standard 8051. In should also be noted that when using Timer 1 to gener-
ate the baud rate in UART Modes 1 or 3, the timer counts at the clock frequency and not at 1/12
the clock frequency. To maintain the same baud rate in the AT89LP428/828 while running at the
same frequency as a standard 8051, the time-out period must be 12 times longer. Mode 1 of
Timer 1 supports 16-bit auto-reload to facilitate longer time-out periods for generating low baud
rates. Timer 2 generated baud rates are twice as fast in the AT89LP428/828 than on standard
8051s when operating at the same frequency.
2.2.7
Watchdog Timer
The Watchdog Timer in AT89LP428/828 counts at a rate of once per clock cycle. This compares
to once every 12 clocks in the standard 8051. A common prescaler is available to divide the time
base for all timers and reduce the counting rate.
2.2.8
I/O Ports
The I/O ports of the AT89LP428/828 may be configured in four different modes. By default all
the I/O ports revert to input-only (tristated) mode at power-up or reset. In the standard 8051, all
ports are weakly pulled high during power-up or reset. To enable 8051-like ports, the ports must
be put into quasi-bidirectional mode by clearing the P1M0, P2M0, P3M0 and P4M0 SFRs. The
user can also configure the ports to start in quasi-bidirectional mode by disabling the Tristate-
Port User Fuse. When this fuse is disabled, P1M0, P2M0, P3M0 and P4M0 will reset to 00H
instead of FFH and the ports will be weakly pulled high.
3.
Memory Organization
The AT89LP428/828 uses a Harvard Architecture with separate address spaces for program
and data memory. The program memory has a regular linear address space with support for
upto 64K bytes of directly addressable application code. The data memory has 256 bytes of
internal RAM and 128 bytes of Special Function Register I/O space. The AT89LP428/828
does not support external data memory or external program memory; however, portions of the
external data memory space are implemented on chip as Extra RAM and nonvolatile Flash
data memory. The memory address spaces of the AT89LP428 and AT89LP828 are listed in
Table 3-1.
AT89LP428 Memory Address Spaces
Name
Description
Range
DATA
Directly addressable internal RAM
00H - 7FH
IDATA
Indirectly addressable internal RAM and stack space
00H - FFH
SFR
Directly addressable I/O register space
80H - FFH
EDATA
On-chip Extra RAM
0000H - 01FFH
FDATA
On-chip nonvolatile Flash data memory
0200H - 03FFH
CODE
On-chip nonvolatile Flash program memory
0000H - 0FFFH
SIG
On-chip nonvolatile Flash signature array
0000H - 00FFH
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AT89LP828-20MH 功能描述:8位微控制器 -MCU Single Cycle 8051 8K ISP Flash 2.4V-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
AT89LP828-20PU 功能描述:8位微控制器 -MCU Single Cycle 8051 8K ISP Flash 2.4V-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
AT89LP828-AU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K 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
AT89LP828-JU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K 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
AT89LP828-PU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K 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