参数资料
型号: AT89LS52-16AC
厂商: Atmel
文件页数: 2/39页
文件大小: 0K
描述: IC MCU 8K FLASH LV 16MHZ 44-TQFP
标准包装: 160
系列: 89LS
核心处理器: 8051
芯体尺寸: 8-位
速度: 16MHz
连通性: UART/USART
外围设备: WDT
输入/输出数: 32
程序存储器容量: 8KB(8K x 8)
程序存储器类型: 闪存
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 4 V
振荡器型: 内部
工作温度: 0°C ~ 70°C
封装/外壳: 44-TQFP
包装: 托盘
10
2601C–MICRO–06/08
AT89LS52
6.
Memory Organization
MCS-51 devices have a separate address space for Program and Data Memory. Up to 64K
bytes each of external Program and Data Memory can be addressed.
6.1
Program Memory
If the EA pin is connected to GND, all program fetches are directed to external memory.
On the AT89LS52, if EA is connected to V
CC, program fetches to addresses 0000H through
1FFFH are directed to internal memory and fetches to addresses 2000H through FFFFH are
directed to external memory.
6.2
Data Memory
The AT89LS52 implements 256 bytes of on-chip RAM. The upper 128 bytes occupy a parallel
address space to the Special Function Registers. This means that the upper 128 bytes have the
same addresses as the SFR space but are physically separate from SFR space.
When an instruction accesses an internal location above address 7FH, the address mode used
in the instruction specifies whether the CPU accesses the upper 128 bytes of RAM or the SFR
space. Instructions which use direct addressing access of the SFR space.
For example, the following direct addressing instruction accesses the SFR at location 0A0H
(which is P2).
MOV 0A0H, #data
Instructions that use indirect addressing access the upper 128 bytes of RAM. For example, the
following indirect addressing instruction, where R0 contains 0A0H, accesses the data byte at
address 0A0H, rather than P2 (whose address is 0A0H).
MOV @R0, #data
Note that stack operations are examples of indirect addressing, so the upper 128 bytes of data
RAM are available as stack space.
Table 5-4.
AUXR1: Auxiliary Register 1
AUXR1
Address = A2H
Reset Value = XXXXXXX0B
Not Bit Addressable
–––
DPS
Bit
765
4
3
2
1
0
Reserved for future expansion
DPS
Data Pointer Register Select
DPS
0
Selects DPTR Registers DP0L, DP0H
1
Selects DPTR Registers DP1L, DP1H
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AT89LS52-16AUR 功能描述:8051 89LS Microcontroller IC 8-Bit 16MHz 8KB (8K x 8) FLASH 44-TQFP (10x10) 制造商:atmel 系列:89LS 包装:托盘 零件状态:有效 核心处理器:8051 核心尺寸:8-位 速度:16MHz 连接性:UART/USART 外设:WDT I/O 数:32 程序存储容量:8KB(8K x 8) 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:256 x 8 电压 - 电源(Vcc/Vdd):2.7 V ~ 4 V 数据转换器:- 振荡器类型:内部 工作温度:-40°C ~ 85°C(TA) 封装/外壳:44-TQFP 供应商器件封装:44-TQFP(10x10) 标准包装:160
AT89LS52-16JC 功能描述:8位微控制器 -MCU LOW VOLTAGE 8K ISP FLASH - 16MHZ 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
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