參數(shù)資料
型號(hào): AT89LP214-20XU
廠商: Atmel
文件頁數(shù): 46/98頁
文件大?。?/td> 0K
描述: MCU 8051 2K FLASH 20MHZ 14-TSSOP
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 95
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(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 12
程序存儲(chǔ)器容量: 2KB(2K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 128 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: 14-TSSOP(0.173",4.40mm 寬)
包裝: 管件
50
3538E–MICRO–11/10
AT89LP213/214
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 trended 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.
18. Serial Peripheral Interface
The serial peripheral interface (SPI) allows high-speed synchronous data transfer between the
AT89LP213/214 and peripheral devices or between multiple AT89LP213/214 devices. The SPI
features include the following:
Full-duplex, 3-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 in Master Mode
End of Transmission Interrupt Flag
Write Collision Flag Protection
Double-buffered Receive
Double-buffered Transmit (Enhanced Mode Only)
Wake up from Idle Mode (Slave Mode Only)
相關(guān)PDF資料
PDF描述
VE-B5X-IW-F2 CONVERTER MOD DC/DC 5.2V 100W
V375A36E500BF3 CONVERTER MOD DC/DC 36V 500W
AT89LP213-20XU MCU 8051 2K FLASH 20MHZ 14-TSSOP
V375A36E500BF2 CONVERTER MOD DC/DC 36V 500W
V375A36E500BF CONVERTER MOD DC/DC 36V 500W
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