I2
參數(shù)資料
型號(hào): PIC16LC771-E/SO
廠商: Microchip Technology
文件頁(yè)數(shù): 208/220頁(yè)
文件大?。?/td> 0K
描述: IC MCU OTP 4KX14 A/D PWM 20SOIC
標(biāo)準(zhǔn)包裝: 38
系列: PIC® 16C
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
連通性: I²C,SPI
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 15
程序存儲(chǔ)器容量: 7KB(4K x 14)
程序存儲(chǔ)器類型: OTP
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.5 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 6x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 20-SOIC(0.295",7.50mm 寬)
包裝: 管件
其它名稱: PIC16LC771E/SO
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PIC16C717/770/771
DS41120B-page 86
Advance Information
2002 Microchip Technology Inc.
9.2.11
I2C MASTER MODE REPEATED
START CONDITION TIMING
A Repeated START condition occurs when the RSEN
bit (SSPCON2<1>) is set high while the I2C module is
in the idle state. When the RSEN bit is set, the SCL pin
is asserted low. When the SCL pin is sampled low, the
baud rate generator is loaded with the contents of
SSPADD<6:0> and begins counting. The SDA pin is
released (brought high) for one baud rate generator
count (TBRG). When the baud rate generator times out,
if SDA is sampled high, the SCL pin will be de-asserted
(brought high). When SCL is sampled high, the baud
rate generator is reloaded with the contents of
SSPADD<6:0> and begins counting. SDA and SCL
must be sampled high for one TBRG period. This action
is then followed by assertion of the SDA pin (SDA is
low) for one TBRG period while SCL is high. As soon as
a START condition is detected on the SDA and SCL
pins, the S bit (SSPSTAT<3>) will be set. Following
this, the baud rate generator is reloaded with the con-
tents of SSPAD<6:0> and begins counting. When the
BRG times out a third time, the RSEN bit in the
SSPCON2 register is automatically cleared and SCL is
pulled low. The SSPIF flag is set, which indicates the
Restart sequence is complete.
Immediately following the SSPIF bit transition to true,
the user may write the SSPBUF with the 7-bit address
in 7-bit mode, or the default first address in 10-bit
mode. After the first eight bits are transmitted and an
ACK is received, the user may then perform one of the
following:
Transmit an additional eight bits of address (if the
user transmitted the first half of a 10-bit address
with R/W = 0),
Transmit eight bits of data (if the user transmitted
a 7-bit address with R/W = 0), or
Receive eight bits of data (if the user transmitted
either the first half of a 10-bit address or a 7-bit
address with R/W = 1).
9.2.11.1
WCOL STATUS FLAG
If the user writes the SSPBUF when a Repeated
START sequence is in progress, then WCOL is set and
the contents of the buffer are unchanged (the write
doesn’t occur).
FIGURE 9-17:
REPEAT START CONDITION WAVEFORM
Note 1: If RSEN is set while another event is in
progress, it will not take effect. Queuing of
events is not allowed.
2: A bus collision during the Repeated
START condition occurs if either of the
following is true:
a)
SDA is sampled low when SCL
goes from low to high.
b)
SCL goes low before SDA is
asserted low. This may indicate
that another master is attempting
to transmit a data “1”.
Note:
Because
queueing
of
events
is
not
allowed, writing of the lower five bits of
SSPCON2 is disabled until the Repeated
START condition is complete.
SDA
SCL
Sr = Repeated START
Write to SSPCON2
Write to SSPBUF occurs here.
Falling edge of ninth clock
End of Xmit
At completion of START bit,
hardware clears RSEN bit
1st Bit
Set S (SSPSTAT<3>)
TBRG
SDA = 1,
SCL (no change)
SCL = 1
occurs here.
TBRG
and sets SSPIF
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PIC16LC771-I/P 功能描述:8位微控制器 -MCU 7KB 256 RAM 16 I/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
PIC16LC771-I/SO 功能描述:8位微控制器 -MCU 7KB 256 RAM 16 I/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
PIC16LC771-I/SS 功能描述:8位微控制器 -MCU 7KB 256 RAM 16 I/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
PIC16LC771-I/SS 制造商:Microchip Technology Inc 功能描述:8BIT CMOS MCU SMD 16LC771 SSOP20
PIC16LC771T/SO 功能描述:8位微控制器 -MCU 7KB 256 RAM 16 I/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