參數(shù)資料
型號: AT89LP51-20MU
廠商: Atmel
文件頁數(shù): 25/117頁
文件大?。?/td> 0K
描述: MCU 8051 4K FLASH 20MHZ 7X7MLF
標(biāo)準(zhǔn)包裝: 360
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: 4KB(4K 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: 44-VFQFN 裸露焊盤
包裝: 托盤
15
3709D–MICRO–12/11
AT89LP51/52
address space as shown in Figure 3-6. These memory spaces may require configuration before
the CPU can access them. The AT89LP51/52 includes 256 bytes of nonvolatile Flash data
memory (FDATA).
3.3.1
XDATA
The external data memory space can accommodate up to 64KB of external memory. The
AT89LP51/52 uses the standard 8051 external data memory interface with the upper address
byte on Port 2, the lower address byte and data in/out multiplexed on Port 0, and the ALE, RD
and WR strobes. XDATA can be accessed with both 16-bit (MOVX @DPTR) and 8-bit (MOVX
@Ri) addresses. See Section 3.3.3 on page 18 for more details of the external memory
interface.
Some internal data memory spaces are mapped into portions of the XDATA address space. In
this case the lower address ranges will access internal resources instead of external memory.
Addresses above the range implemented internally will default to XDATA. The AT89LP51/52
supports up to 63.75K or 56K bytes of external memory when using the internally mapped mem-
ories. Setting the EXRAM bit (AUXR.1) to one will force all MOVX instructions to access the
entire 64KB XDATA regardless of their address (See “AUXR – Auxiliary Control Register” on
Figure 3-6.
External Data Memory Map
3.3.2
FDATA
The Flash Data Memory is a portion of the external memory space implemented as an internal
nonvolatile data memory. Flash Data Memory is enabled by setting the DMEN bit (MEMCON.3)
to one. When IAP = 0 and DMEN = 1, the Flash Data Memory is mapped into the FDATA space,
at the bottom of the external memory address space, from 0000H to 00FFH. (See Figure 3-6).
MOVX instructions to this address range will access the internal nonvolatile memory. FDATA is
Flash Data
(FDATA: 256)
00FF
1FFF
2000
Flash Program
(CODE: 8KB)
0000
0100
FFFF
External Data
(XDATA: 64KB)
External Data
(XDATA: 63.75KB)
External Data
(XDATA: 56KB)
FFFF
EXRAM = 1 or
DMEN = 0
IAP = 0
EXRAM = 0
DMEN = 1
IAP = 0
EXRAM = 0
DMEN = x
IAP = 1
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AT89LP51ED2-20AAU 功能描述:8位微控制器 -MCU 64KB 20MHz 2.4V-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89LP51ED2-20AU 功能描述:8位微控制器 -MCU 64KB 20MHz 2.4V-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89LP51ED2-20JU 功能描述:8位微控制器 -MCU 64KB 20MHz 2.4V-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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