参数资料
型号: TOOLSTICK300SPP
厂商: Silicon Laboratories Inc
文件页数: 41/178页
文件大小: 0K
描述: TOOLSTICK PROGRAMMING ADAPTER
标准包装: 1
系列: ToolStick
类型: 微控制器编程器
适用于相关产品: C8051F300
所含物品: 2 个板和 USB 连接线缆
Rev. 2.9
135
C8051F300/1/2/3/4/5
14.3. Multiprocessor Communications
9-Bit UART mode supports multiprocessor communication between a master processor and one or more
slave processors by special use of the ninth data bit. When a master processor wants to transmit to one or
more slaves, it first sends an address byte to select the target(s). An address byte differs from a data byte
in that its ninth bit is logic 1; in a data byte, the ninth bit is always set to logic 0.
Setting the MCE0 bit (SCON.5) of a slave processor configures its UART such that when a stop bit is
received, the UART will generate an interrupt only if the ninth bit is logic one (RB80 = 1) signifying an
address byte has been received. In the UART interrupt handler, software will compare the received
address with the slave's own assigned 8-bit address. If the addresses match, the slave will clear its MCE0
bit to enable interrupts on the reception of the following data byte(s). Slaves that weren't addressed leave
their MCE0 bits set and do not generate interrupts on the reception of the following data bytes, thereby
ignoring the data. Once the entire message is received, the addressed slave resets its MCE0 bit to ignore
all transmissions until it receives the next address byte.
Multiple addresses can be assigned to a single slave and/or a single address can be assigned to multiple
slaves, thereby enabling "broadcast" transmissions to more than one slave simultaneously. The master
processor can be configured to receive all transmissions or a protocol can be implemented such that the
master/slave role is temporarily reversed to enable half-duplex transmission between the original master
and slave(s).
Master
Device
Slave
Device
TX
RX
TX
Slave
Device
RX
TX
Slave
Device
RX
TX
+5V
Figure 14.6. UART Multi-Processor Mode Interconnect Diagram
相关PDF资料
PDF描述
396-070-541-804 CARD EDGE 70POS DL .125X.250 BLK
TOOLSTICK588PP PLATFORM PROG TOOLSTICK F588
EEM22DRKH-S13 CONN EDGECARD 44POS .156 EXTEND
396-070-541-802 CARD EDGE 70POS DL .125X.250 BLK
T95Y476K6R3LSAL CAP TANT 47UF 6.3V 10% 2910
相关代理商/技术参数
参数描述
TOOLSTICK310PP 功能描述:插座和适配器 C8051F310/12/14 F361 F364 F366 F368 RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x
TOOLSTICK311DC 功能描述:子卡和OEM板 ToolStick C8051F311 Daughter Card RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
TOOLSTICK311PP 功能描述:插座和适配器 C8051F311/13/15 F362 F365 F367 F369 RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x
TOOLSTICK316PP 功能描述:插座和适配器 C8051F316/17 F338 F339 RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x
TOOLSTICK320PP 功能描述:插座和适配器 Dev Tool C8051F320 F342 F343 F346 F347 RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x