参数资料
型号: AT89LP428-20AU
厂商: Atmel
文件页数: 17/149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
113
3654A–MICRO–8/09
AT89LP428/828
22. On-chip Debug System
The AT89LP428/828 On-chip Debug (OCD) System uses a 2-wire serial interface to control pro-
gram flow; read, modify, and write the system state; and program the nonvolatile memory. The
OCD System has the following features:
Complete program flow control
Read-modify-write access to all internal SFRs and data memories
Four hardware program address breakpoints
Unlimited program software breakpoints using BREAK instruction
Break on change in program memory flow
Break on stack overflow/underflow
Break on Watchdog overflow
Break on reset
Non-intrusive operation
Programming of nonvolatile memory
22.1
Physical Interface
The On-chip Debug System uses a 2-wire synchronous serial interface to establish communica-
tion between the target device and the controlling emulator system. The OCD interface is
controlled by two User Fuses. OCD is enabled by clearing the OCD Enable Fuse. The OCD
device connections are shown in Figure 22-1. When OCD is enabled, the RST port pin is config-
ured as an input for the Debug Clock (DCL). Either the XTAL1, XTAL2 or P3.7 pin is configured
as a bi-directional data line for the Debug Data (DDA) depending on the clock source selected. If
the Internal RC Oscillator is selected, XTAL1 is configured as DDA (A). If the External Clock is
selected, XTAL2 is configured as DDA (B). If the Crystal Oscillator is selected, P3.7 is config-
ured as DDA (C). When OCD is enabled, the type of interface used depends on the OCD
Interface Select User Fuse. This fuse selects between a normal Two-wire Interface (TWI) and a
fast Two-wire Interface (FTWI). It is the duty of the user to program this fuse to the correct set-
ting for their debug system at the same time they enable OCD (see “User Configuration Fuses”
When designing a system where On-chip Debug will be used, the following observations must
be considered for correct operation:
P3.6/RST cannot be connected directly to V
CC and any external capacitors connected to RST
must be removed.
All external reset sources must be removed.
If P3.7 needs to be debugged in-system using the crystal oscillator, the external clock option
should be selected. The quartz crystal and any capacitors on XTAL1 or XTAL2 must be
removed and an external clock signal must be driven on XTAL1. Some emulator systems may
provide a user-configurable clock for this purpose.
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相关代理商/技术参数
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