參數(shù)資料
型號(hào)： AT89S4051-24PU
廠商： Atmel
文件頁(yè)數(shù)： 8/46頁(yè)
文件大?。?/td> 0K
描述： MCU 8051 4K FLASH 24MHZ 20-PDIP
產(chǎn)品培訓(xùn)模塊： MCU Product Line Introduction
標(biāo)準(zhǔn)包裝： 18
系列： 89S
核心處理器： 8051
芯體尺寸： 8-位
速度： 24MHz
連通性： UART/USART
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，PWM
輸入/輸出數(shù)： 15
程序存儲(chǔ)器容量： 4KB（4K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 256 x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 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
16
3390E–MICRO–6/08
AT89S2051/S4051
be logically ANDed with the SADDR to create the “Given” address which the master will use for
addressing each of the slaves. Use of the Given address allows multiple slaves to be recognized
while excluding others. The following examples will help to show the versatility of this scheme:
Slave 0
SADDR = 1100 0000
SADEN = 1111 1101
Given
= 1100 00X0
Slave 1
SADDR = 1100 0000
SADEN = 1111 1110
Given
= 1100 000X
In the previous example SADDR is the same and the SADEN data is used to differentiate
between the two slaves. Slave 0 requires a 0 in bit 0 and it ignores bit 1. Slave 1 requires a 0 in
bit 1 and bit 0 is ignored. A unique address for slave 0 would be 1100 0010 since slave 1
requires a 0 in bit 1. A unique address for slave 1 would be 1100 0001 since a 1 in bit 0 will
exclude slave 0. Both slaves can be selected at the same time by an address which has bit 0 = 0
(for slave 0) and bit 1 = 0 (for slave 1). Thus, both could be addressed with 1100 0000.
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 logical 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 0s.
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 microcontroller
to use standard 80C51-type UART drivers which do not make use of this feature.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT89S4051-24SU 功能描述:8位微控制器 -MCU 4K FLASH 24MHZ 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
AT89S4051-24SUR 功能描述:8051 89S Microcontroller IC 8-Bit 24MHz 4KB (4K x 8) FLASH 20-SOIC 制造商:atmel 系列:89S 包裝:管件 零件狀態(tài):有效 核心處理器:8051 核心尺寸:8-位 速度:24MHz 連接性:UART/USART 外設(shè):欠壓檢測(cè)/復(fù)位，POR，PWM I/O 數(shù):15 程序存儲(chǔ)容量:4KB（4K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 容量:- RAM 容量:256 x 8 電壓 - 電源（Vcc/Vdd）:2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器類型:內(nèi)部 工作溫度:-40°C ~ 85°C（TA） 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應(yīng)商器件封裝:20-SOIC 標(biāo)準(zhǔn)包裝:37
AT89S4D12-12RC 功能描述:8位微控制器 -MCU Microcontroller 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
AT89S4D12-12RI 功能描述:8位微控制器 -MCU Microcontroller 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
AT89S51-24AC 功能描述:8位微控制器 -MCU 4K ISP FLASH 2.7 TO 5.5V - 24 MHZ 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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