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參數(shù)資料
| 型號： | TS80C51RA2 |
| 廠商： | Atmel Corp. |
| 英文描述： | GT 47C 7#12 40#16 PIN PLUG |
| 中文描述： | 高性能8位微控制器 |
| 文件頁數(shù)： | 36/74頁 |
| 文件大?。?/td> | 903K |
| 代理商： | TS80C51RA2 |
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36
Rev. C - 06 March, 2001
TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
6.6.3. Given Address
Each device has an individual address that is specified in SADDR register; the SADEN register is a mask byte
that contains don’t-care bits (defined by zeros) to form the device’s given address. The don’t-care bits provide the
flexibility to address one or more slaves at a time. The following example illustrates how a given address is formed.
To address a device by its individual address, the SADEN mask byte must be
1111
For example:
SADDR
0101 0110b
SADEN
1111 1100b
Given
0101 01XXb
1111b
.
The following is an example of how to use given addresses to address different slaves:
Slave A:
SADDR
1111 0001b
SADEN
1111 1010b
Given
1111 0X0Xb
Slave B:
SADDR
SADEN
Given
1111 0011b
1111 1001b
1111 0XX1b
Slave C:
SADDR
SADEN
Given
1111 0010b
1111 1101b
1111 00X1b
The SADEN byte is selected so that each slave may be addressed separately.
For slave A, bit 0 (the LSB) is a don’t-care bit; for slaves B and C, bit 0 is a 1. To communicate with slave A
only, the master must send an address where bit 0 is clear (e.g.
1111
For slave A, bit 1 is a 1; for slaves B and C, bit 1 is a don’t care bit. To communicate with slaves B and C, but
not slave A, the master must send an address with bits 0 and 1 both set (e.g.
1111
To communicate with slaves A, B and C, the master must send an address with bit 0 set, bit 1 clear, and bit 2
clear (e.g.
1111
0001b
).
0000b
).
0011b
).
6.6.4. Broadcast Address
A broadcast address is formed from the logical OR of the SADDR and SADEN registers with zeros defined as
don’t-care bits, e.g.:
SADDR
0101 0110b
SADEN
1111 1100b
Broadcast =SADDR OR SADEN
1111 111Xb
The use of don’t-care bits provides flexibility in defining the broadcast address, however in most applications, a
broadcast address is FFh. The following is an example of using broadcast addresses:
Slave A:
SADDR
1111 0001b
SADEN
1111 1010b
Broadcast 1111 1X11b,
Slave B:
SADDR
SADEN
Broadcast 1111 1X11B,
1111 0011b
1111 1001b
Slave C:
SADDR=
SADEN
Broadcast 1111 1111b
1111 0010b
1111 1101b
For slaves A and B, bit 2 is a don’t care bit; for slave C, bit 2 is set. To communicate with all of the slaves, the
master must send an address FFh. To communicate with slaves A and B, but not slave C, the master can send
and address FBh.
相關PDF資料 |
PDF描述 |
|---|---|
| TS80C51RA2-LCAB | High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCAD | High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCAR | High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCBB | High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCBD | High Performance 8-bit Microcontrollers |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TS80C51RA2_02 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller |
| TS80C51RA2_06 | 制造商:IRF 制造商全稱:International Rectifier 功能描述:High Performance 8-bit Microcontroller |
| TS80C51RA2_08 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller |
| TS80C51RA-20 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| TS80C51RA24 | 功能描述:IC MPU 8-BIT 5V 24MHZ EXT 44MQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:80C 標準包裝:96 系列:PIC® 16F 核心處理器:PIC 芯體尺寸:8-位 速度:20MHz 連通性:I²C，SPI 外圍設備:欠壓檢測/復位，POR，PWM，WDT 輸入/輸出數(shù):11 程序存儲器容量:3.5KB（2K x 14） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:128 x 8 電壓 - 電源 (Vcc/Vdd):2.3 V ~ 5.5 V 數(shù)據(jù)轉換器:A/D 8x10b 振蕩器型:內部 工作溫度:-40°C ~ 125°C 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 包裝:管件 |
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