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参数资料
| 型号： | PIC18F2480-E/ML |
| 厂商： | Microchip Technology |
| 文件页数： | 32/88页 |
| 文件大小： | 0K |
| 描述： | IC PIC MCU FLASH 8KX16 28QFN |
| 产品培训模块： | Asynchronous Stimulus |
| 标准包装： | 61 |
| 系列： | PIC® 18F |
| 核心处理器： | PIC |
| 芯体尺寸： | 8-位 |
| 速度： | 25MHz |
| 连通性： | CAN，I²C，SPI，UART/USART |
| 外围设备： | 欠压检测/复位，HLVD，POR，PWM，WDT |
| 输入/输出数： | 25 |
| 程序存储器容量： | 16KB（8K x 16） |
| 程序存储器类型： | 闪存 |
| EEPROM 大小： | 256 x 8 |
| RAM 容量： | 768 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 4.2 V ~ 5.5 V |
| 数据转换器： | A/D 8x10b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 28-VQFN 裸露焊盘 |
| 包装： | 管件 |
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MCP2515
DS21801F-page 38
2010 Microchip Technology Inc.
PROPAGATION SEGMENT
The
Propagation
Segment
(PropSeg)
exists
to
compensate for physical delays between nodes. The
propagation delay is defined as twice the sum of the
signal’s propagation time on the bus line, including the
delays associated with the bus driver. The PropSeg is
programmable from 1 – 8 TQ.
PHASE SEGMENT 1 (PS1) AND PHASE
SEGMENT 2 (PS2)
The two phase segments, PS1 and PS2, are used to
compensate for edge phase errors on the bus. PS1 can
be lengthened (or PS2 shortened) by resyncronization.
PS1 is programmable from 1 – 8 TQ and PS2 is
programmable from 2 – 8 TQ.
SAMPLE POINT
The sample point is the point in the bit time at which the
logic level is read and interpreted. The sample point is
located at the end of PS1. The exception to this rule is
if the sample mode is configured to sample three times
per bit. In this case, while the bit is still sampled at the
end of PS1, two additional samples are taken at one-
half TQ intervals prior to the end of PS1, with the value
of the bit being determined by a majority decision.
INFORMATION PROCESSING TIME
The Information Processing Time (IPT) is the time
required for the logic to determine the bit level of a
sampled bit. The IPT begins at the sample point, is
measured in TQ and is fixed at 2 TQ for the Microchip
CAN module. Since PS2 also begins at the sample
point and is the last segment in the bit time, it is
required that the PS2 minimum is not less than the IPT.
Therefore:
SYNCHRONIZATION JUMP WIDTH
The Synchronization Jump Width (SJW) adjusts the bit
clock as necessary by 1 – 4 TQ (as configured) to
maintain
synchronization
with
the
transmitted
message. Synchronization is covered in more detail
later in this data sheet.
Time Quantum
Each of the segments that make up a bit time are made
up of integer units called Time Quanta (TQ). The length
of each Time Quantum is based on the oscillator period
(tOSC). The base TQ equals twice the oscillator period.
Figure 5-2 shows how the bit period is derived from
TOSC and TQ. The TQ length equals one TQ clock
period (tBRPCLK), which is programmable using a
programmable
prescaler,
called
the
Baud
Rate
Prescaler (BRP). This is illustrated in the following
equation:
EQUATION 5-2:
FIGURE 5-2:
TQ AND THE BIT PERIOD
PS2
min
IPT
2TQ
==
TQ
2 BRP T
OSC
2BRP
F
OSC
-------------------
==
Where: BRP equals the configuration as shown in
tOSC
TBRPCLK
tBIT
Sync
(fixed)
PropSeg
(Programmable)
PS2
(Programmable)
PS1
(Programmable)
TQ
(tTQ)
CAN Bit Time
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PIC18F2480-I/ML | 功能描述:8位微控制器 -MCU 16 KB 768 RAM 25 I/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 |
| PIC18F2480-I/SO | 功能描述:8位微控制器 -MCU 16 KB 768 RAM 25 I/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 |
| PIC18F2480-I/SP | 功能描述:8位微控制器 -MCU 16 KB 768 RAM 25 I/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 |
| PIC18F2480T-I/ML | 功能描述:8位微控制器 -MCU 16 KB 768 RAM 25 I/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 |
| PIC18F2480T-I/SO | 功能描述:8位微控制器 -MCU 16 KB 768 RAM 25 I/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 |
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