參數(shù)資料
型號(hào)： PIC16LF1527T-I/PT
廠商： Microchip Technology
文件頁數(shù)： 42/94頁
文件大?。?/td> 0K
描述： MCU PIC 28KB FLASH 64TQFP
標(biāo)準(zhǔn)包裝： 1,200
系列： PIC® XLP™ 16F
核心處理器： PIC
芯體尺寸： 8-位
速度： 20MHz
連通性： I²C，LIN，SPI，UART/USART
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 54
程序存儲(chǔ)器容量： 28KB（16K x 14）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 1.5K x 8
電壓 - 電源 (Vcc/Vdd)： 1.8 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 30x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 64-TQFP
包裝： 帶卷 (TR)
208
7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
21.3
Data Transfer and Frame Format
21.3.1
Transferring Bits
Each data bit transferred on the TWI bus is accompanied by a pulse on the clock line. The level
of the data line must be stable when the clock line is high. The only exception to this rule is for
generating start and stop conditions.
Figure 21-2. Data Validity
21.3.2
START and STOP Conditions
The Master initiates and terminates a data transmission. The transmission is initiated when the
Master issues a START condition on the bus, and it is terminated when the Master issues a
STOP condition. Between a START and a STOP condition, the bus is considered busy, and no
other master should try to seize control of the bus. A special case occurs when a new START
condition is issued between a START and STOP condition. This is referred to as a REPEATED
START condition, and is used when the Master wishes to initiate a new transfer without relin-
quishing control of the bus. After a REPEATED START, the bus is considered busy until the next
STOP. This is identical to the START behavior, and therefore START is used to describe both
START and REPEATED START for the remainder of this datasheet, unless otherwise noted. As
depicted below, START and STOP conditions are signalled by changing the level of the SDA
line when the SCL line is high.
Figure 21-3. START, REPEATED START and STOP conditions
SDA
SCL
Data Stable
Data Change
SDA
SCL
START
STOP
REPEATED START
STOP
START
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