参数资料
型号: AT89LP828-20JU
厂商: Atmel
文件页数: 46/149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
14
3654A–MICRO–8/09
AT89LP428/828
3.4
In-Application Programming (IAP)
The AT89LP428/828 supports In-Application Programming (IAP), allowing the program memory
to be modified during execution. The IAP can be used to modify the user application on-the-fly or
to use program memory for nonvolatile data storage. The same write protocol for FDATA also
applies to IAP (see “Write Protocol” on page 12). The CPU is always placed in idle while modify-
ing the program memory. When the write completes, the CPU will continue executing with the
instruction after the MOVX @DPTR,A instruction that started the write.
To enable access to the program memory, the IAP bit (MEMCON.7) must be set to one and the
IAP User Fuse must be enabled. The IAP User Fuse can disable all IAP operations. When this
fuse is disabled, the IAP bit will be forced to 0. While IAP is enabled, all MOVX @DPTR instruc-
tions will access the CODE space instead of EDATA or FDATA. The IAP also allows
reprogramming of the User Signature Array when SIGEN = 1. The IAP access settings are sum-
marized in Table 3-5.
Table 3-4.
MEMCON
– Memory Control Register
MEMCON = 96H
Reset Value = 0000 00XXB
Not Bit Addressable
IAP
AERS
LDPG
MWEN
DMEN
ABORT
WRTINH
Bit
7654
3210
Symbol
Function
IAP
In-Application Programming Enable. When IAP = 1 and the IAP Fuse is enabled, programming of the CODE/SIG space
is enabled and MOVX @DPTR instructions will access CODE/SIG instead of EDATA or FDATA. Clear IAP to disable
programming of CODE/SIG and allow access to EDATA and FDATA.
AERS
Auto-Erase Enable. Set to perform an auto-erase of a Flash memory page (CODE, SIG or FDATA) during the next write
sequence. Clear to perform write without erase.
LDPG
Load Page Enable. Set to this bit to load multiple bytes to the temporary page buffer. Byte locations may not be loaded
more than once before a write. LDPG must be cleared before writing.
MWEN
Memory Write Enable. Set to enable programming of a nonvolatile memory location (CODE, SIG or FDATA). Clear to
disable programming of all nonvolatile memories.
DMEN
Data Memory Enable. Set to enable nonvolatile data memory and map it into the FDATA space. Clear to disable
nonvolatile data memory.
ABORT
Abort Flag. Set by hardware if an error occurred during the last programming sequence due to a brownout condition
(low voltage on VCC). Must be cleared by software.
WRTINH
Write Inhibit Flag.
Cleared by hardware when the voltage on V
CC has fallen below the minimum programming
voltage. Set by hardware when the voltage on V
CC is above the minimum programming voltage.
Table 3-5.
IAP Access Settings
IAP
SIGEN
DMEN
MOVX @DPTR
MOVC @DPTR
0
EDATA
CODE
0
1
FDATA
CODE
01
0
EDATA
SIG
01
1
FDATA
SIG
1
0
X
CODE
11
X
SIG
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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