參數(shù)資料
型號: AT89LP52-20PU
廠商: Atmel
文件頁數(shù): 13/117頁
文件大?。?/td> 0K
描述: IC MCU 8051 8K FLASH SPI 40PDIP
標(biāo)準(zhǔn)包裝: 10
系列: 89LP
核心處理器: 8051
芯體尺寸: 8-位
速度: 20MHz
連通性: EBI/EMI,I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 36
程序存儲器容量: 8KB(8K x 8)
程序存儲器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.4 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
11
3709D–MICRO–12/11
AT89LP51/52
3.
Memory Organization
The AT89LP51/52 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 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 AT89LP51/52 supports up to 64K
bytes of external data memory, with portions of the external data memory space implemented on
chip as nonvolatile Flash data memory. External program memory is supported for addresses
above 8K. The memory address spaces of the AT89LP51/52 are listed in Table 3-1.
3.1
Program Memory
The AT89LP51/52 contains 4K/8K bytes of on-chip In-System Programmable Flash memory for
program storage, plus support for up to 60K/56K bytes of external program memory. The Flash
memory has an endurance of at least 10,000 write/erase cycles and a minimum data retention
time of 10 years. The reset and interrupt vectors are located within the first 83 bytes of program
memory (refer to Table 9-1 on page 38). Constant tables can be allocated within the entire 64K
program memory address space for access by the MOVC instruction. A map of the
AT89LP51/52 program memory is shown in Figure 3-1.
Pin Sampling Rate (INT0, INT1, T0, T1, T2, T2EX)
Prescaler Rate
System Clock
Minimum RST input pulse in System Clocks
12
2
WDIDLE and DISRTO bit locations
AUXR
WDTCON
Table 2-3.
Compatibility Mode versus Fast Mode Summary
Feature
Compatibility
Fast
Table 3-1.
AT89LP51/52 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
FDATA
On-chip nonvolatile Flash data memory
0000H–00FFH
XDATA
External data memory
0100H–FFFFH
CODE
On-chip nonvolatile Flash program memory
0000H–0FFFH (AT89LP51)
0000H–1FFFH (AT89LP52)
XCODE
External program memory
2000H–FFFFH (AT89LP51)
1000H–FFFFH (AT89LP52)
SIG
On-chip nonvolatile Flash signature array
0000H–01FFH
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