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參數(shù)資料
| 型號： | AT89LP2052-20PU |
| 廠商： | Atmel |
| 文件頁數(shù)： | 2/94頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 8051 MCU FLASH 2K 20DIP |
| 產(chǎn)品培訓模塊： | MCU Product Line Introduction |
| 標準包裝： | 18 |
| 系列： | 89LP |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 20MHz |
| 連通性： | SPI，UART/USART |
| 外圍設備： | 欠壓檢測/復位，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 15 |
| 程序存儲器容量： | 2KB（2K 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： | 20-DIP（0.300"，7.62mm） |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 616 (CN2011-ZH PDF) |
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10
3547J–MICRO–10/09
AT89LP2052/LP4052
9.
Restrictions on Certain Instructions
The AT89LP2052/LP4052 is an economical and cost-effective member of Atmel's growing fam-
ily of microcontrollers. It contains 2/4K bytes of Flash program memory. It is fully compatible with
the MCS-51 architecture, and can be programmed using the MCS-51 instruction set. However,
there are a few considerations one must keep in mind when utilizing certain instructions to pro-
gram this device. All the instructions related to jumping or branching should be restricted such
that the destination address falls within the physical program memory space of the device, which
is 2K bytes for the AT89LP2052 and 4K bytes for the AT89LP4052. This should be the responsi-
bility of the software programmer. For example, LJMP 7E0H would be a valid instruction for the
AT89LP2052 (with 2K bytes of memory), whereas LJMP 900H would not.
9.1
Branching Instructions
The LCALL, LJMP, ACALL, AJMP, SJMP, and JMP @A+DPTR unconditional branching instruc-
tions will execute correctly as long as the programmer keeps in mind that the destination
branching address must fall within the physical boundaries of the program memory size (loca-
tions 000H to 7FFH for the AT89LP2052, 000H to FFFH for the AT89LP4052). Violating the
physical space limits may cause unknown program behavior. With the CJNE [...], DJNZ [...], JB,
JNB, JC, JNC, JBC, JZ, and JNZ conditional branching instructions, the same previous rule
applies. Again, violating the memory boundaries may cause erratic execution. For applications
involving interrupts, the normal interrupt service routine address locations of the 8051 family
architecture have been preserved.
9.2
MOVX-related Instructions, Data Memory
External DATA memory access is not supported in this device, nor is external PROGRAM mem-
ory execution. Therefore, no MOVX [...] instructions should be included in the program. A typical
8051 assembler will still assemble instructions, even if they are written in violation of the restric-
tions mentioned above. It is the responsibility of the user to know the physical features and
limitations of the device being used and to adjust the instructions used accordingly.
10. System Clock
The system clock is generated directly from one of two selectable clock sources. The two
sources are the on-chip crystal oscillator and external clock source. No internal clock division is
used to generate the CPU clock from the system clock.
10.1
Crystal Oscillator
When enabled, the internal inverting oscillator amplifier is connected between XTAL1 and
XTAL2 for connection to an external quartz crystal or ceramic resonator. When using the crystal
oscillator, XTAL2 should not be used to drive a board-level clock.
10.2
External Clock Source
The external clock option is selected by setting the Oscillator Bypass fuse. This disables the
amplifier and allows XTAL1 to be driven directly by the clock source. XTAL2 may be left
unconnected.
10.3
System Clock Out
When the System Clock Out fuse is enabled, P3.7 will output the system clock with no division
using the push-pull output mode. During Power-down the system clock will output as “1”.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AT89LP2052-20SU | 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K FLASH 20MHZ 2.4-5.5V 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 安裝風格:SMD/SMT |
| AT89LP2052-20XU | 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K FLASH-20MHZ 2.4-5.5V 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 安裝風格:SMD/SMT |
| AT89LP2052W-10PU | 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.0-3.6V 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 安裝風格:SMD/SMT |
| AT89LP2052W-10SU | 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.0-3.6V 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 安裝風格:SMD/SMT |
| AT89LP2052W-10XU | 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.0-3.6V 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 安裝風格:SMD/SMT |
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