參數(shù)資料
型號: PIC12F1822T-I/MF
廠商: Microchip Technology
文件頁數(shù): 26/109頁
文件大?。?/td> 0K
描述: MCU 8BIT 2K FLASH 8DFN
標(biāo)準包裝: 3,300
系列: PIC® XLP™ 12F
核心處理器: PIC
芯體尺寸: 8-位
速度: 32MHz
連通性: I²C,LIN,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 6
程序存儲器容量: 3.5KB(2K x 14)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 8-VDFN 裸露焊盤
包裝: 帶卷 (TR)
214
7674F–AVR–09/09
ATmega164P/324P/644P
Figure 19-7. SCL Synchronization Between Multiple Masters
Arbitration is carried out by all masters continuously monitoring the SDA line after outputting
data. If the value read from the SDA line does not match the value the Master had output, it has
lost the arbitration. Note that a Master can only lose arbitration when it outputs a high SDA value
while another Master outputs a low value. The losing Master should immediately go to Slave
mode, checking if it is being addressed by the winning Master. The SDA line should be left high,
but losing masters are allowed to generate a clock signal until the end of the current data or
address packet. Arbitration will continue until only one Master remains, and this may take many
bits. If several masters are trying to address the same Slave, arbitration will continue into the
data packet.
Figure 19-8. Arbitration Between Two Masters
TA
low
TA
high
SCL from
Master A
SCL from
Master B
SCL Bus
Line
TB
low
TB
high
Masters Start
Counting Low Period
Masters Start
Counting High Period
SDA from
Master A
SDA from
Master B
SDA Line
Synchronized
SCL Line
START
Master A Loses
Arbitration, SDA
A
SDA
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