參數(shù)資料
型號(hào): PIC18F2420-E/ML
廠商: Microchip Technology
文件頁數(shù): 29/151頁
文件大小: 0K
描述: IC PIC MCU FLASH 8KX16 28QFN
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
PIC18 J Series MCU Overview
標(biāo)準(zhǔn)包裝: 61
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(cè)/復(fù)位,HLVD,POR,PWM,WDT
輸入/輸出數(shù): 25
程序存儲(chǔ)器容量: 16KB(8K x 16)
程序存儲(chǔ)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-VQFN 裸露焊盤
包裝: 管件
2011-2012 Microchip Technology Inc.
Preliminary
DS41579C-page 297
PIC16(L)F1782/3
26.6.2
CLOCK ARBITRATION
Clock arbitration occurs when the master, during any
receive, transmit or Repeated Start/Stop condition,
releases the SCL pin (SCL allowed to float high). When
the SCL pin is allowed to float high, the Baud Rate Gen-
erator (BRG) is suspended from counting until the SCL
pin is actually sampled high. When the SCL pin is sam-
pled high, the Baud Rate Generator is reloaded with
the contents of SSPADD<7:0> and begins counting.
This ensures that the SCL high time will always be at
least one BRG rollover count in the event that the clock
is held low by an external device (Figure 26-25).
FIGURE 26-25:
BAUD RATE GENERATOR TIMING WITH CLOCK ARBITRATION
26.6.3
WCOL STATUS FLAG
If the user writes the SSPBUF when a Start, Restart,
Stop, Receive or Transmit sequence is in progress, the
WCOL is set and the contents of the buffer are
unchanged (the write does not occur). Any time the
WCOL bit is set it indicates that an action on SSPBUF
was attempted while the module was not idle.
SDA
SCL
SCL deasserted but slave holds
DX
1
DX
BRG
SCL is sampled high, reload takes
place and BRG starts its count
03h
02h
01h
00h (hold off)
03h
02h
Reload
BRG
Value
SCL low (clock arbitration)
SCL allowed to transition high
BRG decrements on
Q2 and Q4 cycles
Note:
Because queueing of events is not
allowed, writing to the lower 5 bits of
SSPCON2 is disabled until the Start
condition is complete.
相關(guān)PDF資料
PDF描述
PIC16F87-E/SS IC MCU FLASH 4KX14 EEPROM 20SSOP
VE-2N3-CV-F1 CONVERTER MOD DC/DC 24V 150W
DG406DYZ IC MULTIPLEXER 16X1 28SOIC
PIC16C55-10/SO IC MCU OTP 512X12 28SOIC
VE-2N2-CV-F4 CONVERTER MOD DC/DC 15V 150W
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(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
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(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
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(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
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(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