參數(shù)資料
型號： PIC18F2420-E/SO
廠商： Microchip Technology
文件頁數(shù)： 41/151頁
文件大小： 0K
描述： IC MCU FLASH 8KX16 28SOIC
產(chǎn)品培訓(xùn)模塊： Asynchronous Stimulus
標(biāo)準(zhǔn)包裝： 27
系列： PIC® 18F
核心處理器： PIC
芯體尺寸： 8-位
速度： 25MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： 欠壓檢測/復(fù)位，HLVD，POR，PWM，WDT
輸入/輸出數(shù)： 25
程序存儲器容量： 16KB（8K x 16）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量： 768 x 8
電壓 - 電源 (Vcc/Vdd)： 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 10x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 125°C
封裝/外殼： 28-SOIC（0.295"，7.50mm 寬）
包裝： 管件
PIC16(L)F1782/3
DS41579C-page 308
Preliminary
2011-2012 Microchip Technology Inc.
26.6.13.2
Bus Collision During a Repeated
Start Condition
During a Repeated Start condition, a bus collision
occurs if:
a)
A low level is sampled on SDA when SCL goes
from low level to high level.
b)
SCL goes low before SDA is asserted low,
indicating that another master is attempting to
transmit a data ‘1’.
When the user releases SDA and the pin is allowed to
float high, the BRG is loaded with SSPADD and counts
down to zero. The SCL pin is then deasserted and
when sampled high, the SDA pin is sampled.
If SDA is low, a bus collision has occurred (i.e., another
master is attempting to transmit a data ‘0’, Figure 26-35).
If SDA is sampled high, the BRG is reloaded and begins
counting. If SDA goes from high-to-low before the BRG
times out, no bus collision occurs because no two
masters can assert SDA at exactly the same time.
If SCL goes from high-to-low before the BRG times out
and SDA has not already been asserted, a bus collision
occurs. In this case, another master is attempting to
transmit a data ‘1’ during the Repeated Start condition,
If, at the end of the BRG time-out, both SCL and SDA
are still high, the SDA pin is driven low and the BRG is
reloaded and begins counting. At the end of the count,
regardless of the status of the SCL pin, the SCL pin is
driven low and the Repeated Start condition is
complete.
FIGURE 26-36:
BUS COLLISION DURING A REPEATED START CONDITION (CASE 1)
FIGURE 26-37:
BUS COLLISION DURING REPEATED START CONDITION (CASE 2)
SDA
SCL
RSEN
BCLIF
S
SSPIF
Sample SDA when SCL goes high.
If SDA = 0, set BCLIF and release SDA and SCL.
Cleared by software
’0’
SDA
SCL
BCLIF
RSEN
S
SSPIF
Interrupt cleared
by software
SCL goes low before SDA,
set BCLIF. Release SDA and SCL.
TBRG
’0’
相關(guān)PDF資料
PDF描述
PIC32MX250F128CT-I/TL IC MCU 32BIT 128KB FLASH 36VTLA
PIC32MX250F128BT-V/SO IC MCU 32BIT 128KB FLASH 28SOIC
VI-JN1-IY-B1 CONVERTER MOD DC/DC 12V 50W
DSPIC33EP64MC506T-E/PT IC DSC 16BIT 64KB FLASH 64TQFP
VI-J3P-IY-B1 CONVERTER MOD DC/DC 13.8V 50W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC18F2420-I/ML 功能描述:8位微控制器 -MCU 16kBF 768RM 25I/O 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
PIC18F2420-I/SO 功能描述:8位微控制器 -MCU 16KB 768 RAM 25I/O 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
PIC18F2420-I/SOG 制造商:Microchip Technology 功能描述:MCU 8-Bit PIC18 PIC RISC 16KB Flash 5V 28-Pin SOIC W Tube
PIC18F2420-I/SP 功能描述:8位微控制器 -MCU 16KB 768 RAM 25I/O 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
PIC18F2420T-I/ML 功能描述:8位微控制器 -MCU 16KB 768 RAM 25I/O 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*