參數(shù)資料
型號(hào)： AT89LP52-20JU
廠商： Atmel
文件頁數(shù)： 2/117頁
文件大?。?/td> 0K
描述： IC MCU 8051 8K FLASH SPI 44PLCC
標(biāo)準(zhǔn)包裝： 27
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(cè)/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 36
程序存儲(chǔ)器容量： 8KB（8K x 8）
程序存儲(chǔ)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-LCC（J 形引線）
包裝： *
10
3709D–MICRO–12/11
AT89LP51/52
2.3.5
Interrupt Handling
With the addition of the IPH register, the AT89LP51/52 provides four levels of interrupt priority
for greater flexibility in handling multiple interrupts. Also, Fast mode allows for faster interrupt
response due to the shorter instruction execution times.
2.3.6
Serial Port
The timer prescaler increases the range of achievable baud rates when using Timer 1 to gener-
ate the baud rate in UART Modes 1 or 3, including an increase in the maximum baud rate
available in Compatibility mode. Additional features include automatic address recognition and
framing error detection.
The shift register mode (Mode 0) has been enhanced with more control of the polarity, phase
and frequency of the clock and full-duplex operation. This allows emulation of master serial
pheriperal (SPI) and two-wire (TWI) interfaces.
2.3.7
I/O Ports
The P0, P1, P2 and P3 I/O ports of the AT89LP51/52 may be configured in four different modes.
The default setting depends on the Tristate-Port User Fuse (See Section 17.7 on page 86).
When the fuse is set all the I/O ports revert to input-only (tristated) mode at power-up or reset.
When the fuse is not active, ports P1, P2 and P3 start in quasi-bidirectional mode and P0 starts
in open-drain mode. P4 always operates in quasi-bidirectional mode. P0 can be configured to
have internal pull-ups by placing it in quasi-bidirectional or output modes. This can reduce sys-
tem cost by removing the need for external pull-ups on Port 0.
The P4.4–P4.7 pins are additional I/Os that replace the normally dedicated ALE, PSEN, XTAL1
and XTAL2 pins of the AT89S51/52. These pins can be used as additional I/Os depending on
the configuration of the clock and external memory.
2.3.8
Security
The AT89LP51/52 does not support the extenal access pin (EA). Therefore it is not possible to
execute from external program memory in address range 0000H–1FFFH. When the third Lockbit
is enabled (Lock Mode 4) external program execution is disabled for all addresses above
1FFFH. This differs from AT89S51/52 where Lock Mode 4 prevents EA from being sampled low,
but may still allow external execution at addresses outside the 8K internal space.
2.3.9
Programming
The AT89LP51/52 supports a richer command set for In-System Programming (ISP). Existing
AT89S51/52 programmers should be able to program the AT89LP51/52 in byte mode. In page
mode the AT89LP51/52 only supports programming of a half-page of 64 bytes and therefore
requires an extra address byte as compared to AT89S51/52. Furthermore the device signature
is located at addresses 0000H, 0001H and 0003H instead of 0000H, 0100H and 0200H.
Table 2-3.
Compatibility Mode versus Fast Mode Summary
Feature
Compatibility
Fast
Instruction Fetch in System Clocks
31
Instruction Execution Time in System Clocks
6, 12, 18 or 24
1, 2, 3, 4 or 5
Default System Clock Divisor
2
1
Default Timer Prescaler Divisor
6
1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT89LP52-20MU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K ISP Flash MCU 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
AT89LP52-20PU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K ISP Flash MCU 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
AT89LP6440-20AU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP Flash 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
AT89LP6440-20JU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP Flash 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
AT89LP6440-20MU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP Flash 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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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