參數(shù)資料
型號： AT89LP428-20PU
廠商： Atmel
文件頁數(shù)： 141/149頁
文件大?。?/td> 0K
描述： MCU 8051 4K FLASH SPI 28PDIP
產(chǎn)品培訓模塊： MCU Product Line Introduction
標準包裝： 14
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)： 30
程序存儲器容量： 4KB（4K x 8）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 512 x 8
RAM 容量： 768 x 8
電壓 - 電源 (Vcc/Vdd)： 2.4 V ~ 5.5 V
振蕩器型： 內部
工作溫度： -40°C ~ 85°C
封裝/外殼： 28-DIP（0.300"，7.62mm）
包裝： 管件
91
3654A–MICRO–8/09
AT89LP428/828
In a more complex system, the following could be used to select slaves 1 and 2 while excluding
slave 0:
Slave 0
SADDR = 1100 0000
SADEN = 1111 1001
Given
= 1100 0XX0
Slave 1
SADDR = 1110 0000
SADEN = 1111 1010
Given
= 1110 0X0X
Slave 2
SADDR = 1110 0000
SADEN = 1111 1100
Given
= 1110 00XX
In the above example, the differentiation among the 3 slaves is in the lower 3 address bits. Slave
0 requires that bit 0 = 0 and it can be uniquely addressed by 1110 0110. Slave 1 requires that
bit 1 = 0 and it can be uniquely addressed by 1110 and 0101. Slave 2 requires that bit 2 = 0 and
its unique address is 1110 0011. To select Slaves 0 and 1 and exclude Slave 2, use address
1110 0100, since it is necessary to make bit 2 = 1 to exclude slave 2.
The Broadcast Address for each slave is created by taking the logic OR of SADDR and SADEN.
Zeros in this result are treated as don’t cares. In most cases, interpreting the don’t cares as
ones, the broadcast address will be FF hexadecimal.
Upon reset SADDR (SFR address 0A9H) and SADEN (SFR address 0B9H) are loaded with
“0”s. This produces a given address of all “don’t cares” as well as a Broadcast address of all
“don’t cares”. This effectively disables the Automatic Addressing mode and allows the microcon-
troller to use standard 80C51-type UART drivers which do not make use of this feature.
17. Enhanced Serial Peripheral Interface
The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between the
AT89LP428/828 and peripheral devices or between multiple AT89LP428/828 devices, including
multiple masters and slaves on a single bus. The SPI includes the following features:
Full-duplex, 3-wire or 4-wire Synchronous Data Transfer
Master or Slave Operation
Maximum Bit Frequency = f
OSC/4
LSB First or MSB First Data Transfer
Four Programmable Bit Rates or Timer 1-based Baud Generation (Master Mode)
End of Transmission Interrupt Flag
Write Collision Flag Protection
Double-buffered Receive and Transmit
Transmit Buffer Empty Interrupt Flag
Mode Fault (Master Collision) Detection and Interrupt
Wake up from Idle Mode
A block diagram of the SPI is shown in Figure 17-1.
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AT89LP51-20AU 功能描述:8位微控制器 -MCU Single Cycle 8051 4K ISP FL 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
AT89LP51-20JU 功能描述:8位微控制器 -MCU Single Cycle 8051 4K ISP FL 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
AT89LP51-20MU 功能描述:8位微控制器 -MCU Single Cycle 8051 4K ISP FL 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
AT89LP51-20PU 功能描述:8位微控制器 -MCU Single Cycle 8051 4K ISP FL 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
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 安裝風格:SMD/SMT
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