參數(shù)資料
型號(hào): PIC18F442-E/PT
廠商: Microchip Technology
文件頁數(shù): 40/134頁
文件大?。?/td> 0K
描述: IC MCU CMOS 40MHZ 8K FLSH 44TQFP
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
標(biāo)準(zhǔn)包裝: 160
系列: PIC® 18F
核心處理器: PIC
芯體尺寸: 8-位
速度: 40MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,LVD,POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲(chǔ)器容量: 16KB(8K x 16)
程序存儲(chǔ)器類型: 閃存
EEPROM 大小: 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 8x10b
振蕩器型: 外部
工作溫度: -40°C ~ 125°C
封裝/外殼: 44-TQFP
包裝: 托盤
PIC16(L)F1508/9
DS41609A-page 228
Preliminary
2011 Microchip Technology Inc.
21.6.13.3
Bus Collision During a Stop
Condition
Bus collision occurs during a Stop condition if:
a)
After the SDAx pin has been deasserted and
allowed to float high, SDAx is sampled low after
the BRG has timed out.
b)
After the SCLx pin is deasserted, SCLx is
sampled low before SDAx goes high.
The Stop condition begins with SDAx asserted low.
When SDAx is sampled low, the SCLx pin is allowed to
float. When the pin is sampled high (clock arbitration),
the Baud Rate Generator is loaded with SSPxADD and
counts down to 0. After the BRG times out, SDAx is
sampled. If SDAx is sampled low, a bus collision has
occurred. This is due to another master attempting to
drive a data ‘0’ (Figure 21-37). If the SCLx pin is
sampled low before SDAx is allowed to float high, a bus
collision occurs. This is another case of another master
attempting to drive a data ‘0’ (Figure 21-38).
FIGURE 21-38:
BUS COLLISION DURING A STOP CONDITION (CASE 1)
FIGURE 21-39:
BUS COLLISION DURING A STOP CONDITION (CASE 2)
SDAx
SCLx
BCLxIF
PEN
P
SSPxIF
TBRG
SDAx asserted low
SDAx sampled
low after TBRG,
set BCLxIF
’0’
SDAx
SCLx
BCLxIF
PEN
P
SSPxIF
TBRG
Assert SDAx
SCLx goes low before SDAx goes high,
set BCLxIF
’0’
相關(guān)PDF資料
PDF描述
DEHR33A332KA3B CAP CER 3300PF 1KV 10% RADIAL
RPE5C2A102J2S1A03A CAP CER 1000PF 100V 5% RADIAL
RPE5C2A102J2M2A03A CAP CER 1000PF 100V 5% RADIAL
RPE5C2A102J2M1A03A CAP CER 1000PF 100V 5% RADIAL
VI-JTV-IX-F1 CONVERTER MOD DC/DC 5.8V 75W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC18F442-I/L 功能描述:8位微控制器 -MCU 16KB 768 RAM 34I/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(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
PIC18F442-I/L 制造商:Microchip Technology Inc 功能描述:8BIT FLASH MCU SMD 18F442 PLCC44
PIC18F442-I/ML 功能描述:8位微控制器 -MCU 16KB 768 RAM 34I/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(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
PIC18F442-I/P 功能描述:8位微控制器 -MCU 16KB 768 RAM 34I/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(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
PIC18F442-I/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU 18F442 DIP40