参数资料
型号: PIC18LF4520-I/P
厂商: Microchip Technology
文件页数: 42/151页
文件大小: 0K
描述: IC MCU FLASH 16KX16 40DIP
产品培训模块: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
标准包装: 10
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 40MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,HLVD,POR,PWM,WDT
输入/输出数: 36
程序存储器容量: 32KB(16K x 16)
程序存储器类型: 闪存
EEPROM 大小: 256 x 8
RAM 容量: 1.5K x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
数据转换器: A/D 13x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 40-DIP(0.600",15.24mm)
包装: 管件
产品目录页面: 643 (CN2011-ZH PDF)
2011-2012 Microchip Technology Inc.
Preliminary
DS41579C-page 309
PIC16(L)F1782/3
26.6.13.3
Bus Collision During a Stop
Condition
Bus collision occurs during a Stop condition if:
a)
After the SDA pin has been deasserted and
allowed to float high, SDA is sampled low after
the BRG has timed out.
b)
After the SCL pin is deasserted, SCL is sampled
low before SDA goes high.
The Stop condition begins with SDA asserted low.
When SDA is sampled low, the SCL pin is allowed to
float. When the pin is sampled high (clock arbitration),
the Baud Rate Generator is loaded with SSPADD and
counts down to 0. After the BRG times out, SDA is
sampled. If SDA is sampled low, a bus collision has
occurred. This is due to another master attempting to
drive a data ‘0’ (Figure 26-37). If the SCL pin is sampled
low before SDA is allowed to float high, a bus collision
occurs. This is another case of another master
attempting to drive a data ‘0’ (Figure 26-38).
FIGURE 26-38:
BUS COLLISION DURING A STOP CONDITION (CASE 1)
FIGURE 26-39:
BUS COLLISION DURING A STOP CONDITION (CASE 2)
SDA
SCL
BCLIF
PEN
P
SSPIF
TBRG
SDA asserted low
SDA sampled
low after TBRG,
set BCLIF
’0’
SDA
SCL
BCLIF
PEN
P
SSPIF
TBRG
Assert SDA
SCL goes low before SDA goes high,
set BCLIF
’0’
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相关代理商/技术参数
参数描述
PIC18LF4520IPT 制造商:Microchip Technology Inc 功能描述:
PIC18LF4520T-I/ML 功能描述:8位微控制器 -MCU 32KB 1536 RAM 36I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18LF4520T-I/PT 功能描述:8位微控制器 -MCU 32KB 1536 RAM 36I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18LF4523-I/ML 功能描述:8位微控制器 -MCU 32KB FL 1536bytes- RAM 36I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18LF4523-I/P 功能描述:8位微控制器 -MCU 32KB FL 1536bytes- RAM 36I/O RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT