During any SCL low phase," />
參數(shù)資料
型號： ATTINY13V-10SUR
廠商： Atmel
文件頁數(shù)： 64/176頁
文件大小： 0K
描述： MCU AVR 1KB FLASH 10MHZ 8SOIC
產(chǎn)品培訓(xùn)模塊： tinyAVR Introduction
標(biāo)準(zhǔn)包裝： 2,000
系列： AVR® ATtiny
核心處理器： AVR
芯體尺寸： 8-位
速度： 10MHz
外圍設(shè)備： 欠壓檢測/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 6
程序存儲器容量： 1KB（512 x 16）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 64 x 8
RAM 容量： 64 x 8
電壓 - 電源 (Vcc/Vdd)： 1.8 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 4x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 8-SOIC（0.209"，5.30mm 寬）
包裝： 帶卷 (TR)
其它名稱： ATTINY13V-10SUR-ND
ATTINY13V-10SURTR
PIC16(L)F720/721
DS41430C-page 156
Preliminary
2010-2011 Microchip Technology Inc.
17.2.7
CLOCK STRETCHING
During any SCL low phase, any device on the I2C bus
may hold the SCL line low and delay, or pause, the
transmission of data. This “stretching” of a transmission
allows devices to slow down communication on the
bus. The SCL line must be constantly sampled by the
master to ensure that all devices on the bus have
released SCL for more data.
Stretching usually occurs after an ACK bit of a
transmission, delaying the first bit of the next byte. The
SSP module hardware automatically stretches for two
conditions:
After a 10-bit address byte is received (update
SSPADD register)
Anytime the CKP bit of the SSPCON register is
cleared by hardware
The module will hold SCL low until the CKP bit is set.
This allows the user slave software to update SSPBUF
with data that may not be readily available. In 10-bit
addressing modes, the SSPADD register must be
updated after receiving the first and second address
bytes. The SSP module will hold the SCL line low until
the SSPADD has a byte written to it. The UA bit of the
SSPSTAT register will be set, along with SSPIF,
indicating an address update is needed.
17.2.8
FIRMWARE MASTER MODE
Master mode of operation is supported in firmware
using interrupt generation on the detection of the Start
and Stop conditions. The Stop (P) and Start (S) bits of
the SSPSTAT register are cleared from a Reset or
when the SSP module is disabled (SSPEN cleared).
The Stop (P) and Start (S) bits will toggle based on the
Start and Stop conditions. Control of the I2C bus may
be taken when the P bit is set or the bus is Idle and both
the S and P bits are clear.
In Firmware Master mode, the SCL and SDA lines are
manipulated by setting/clearing the corresponding TRIS
bit(s). The output level is always low, irrespective of the
value(s) in the corresponding PORT register bit(s).
When transmitting a ‘1’, the TRIS bit must be set (input)
and a ‘0’, the TRIS bit must be clear (output).
The following events will cause the SSP Interrupt Flag
bit, SSPIF, to be set (SSP Interrupt will occur if
enabled):
Start condition
Stop condition
Data transfer byte transmitted/received
Firmware Master mode of operation can be done with
either the Slave mode Idle (SSPM<3:0> = 1011), or
with either of the Slave modes in which interrupts are
enabled. When both master and slave functionality is
enabled, the software needs to differentiate the
source(s) of the interrupt.
Refer
to
Application
Note
AN554,
“Software
Implementation of I2C Bus Master” (DS00554) for more
information.
17.2.9
MULTI-MASTER MODE
In Multi-Master mode, the interrupt generation on the
detection of the Start and Stop conditions allow the
determination of when the bus is free. The Stop (P) and
Start (S) bits are cleared from a Reset or when the SSP
module is disabled. The Stop (P) and Start (S) bits will
toggle based on the Start and Stop conditions. Control
of the I2C bus may be taken when the P bit of the
SSPSTAT register is set or when the bus is Idle, and
both the S and P bits are clear. When the bus is busy,
enabling the SSP Interrupt will generate the interrupt
when the Stop condition occurs.
In Multi-Master operation, the SDA line must be moni-
tored to see if the signal level is the expected output
level. This check only needs to be done when a high
level is output. If a high level is expected and a low level
is present, the device needs to release the SDA and
SCL lines (set TRIS bits). There are two stages where
this arbitration of the bus can be lost. They are the
Address Transfer and Data Transfer stages.
When the slave logic is enabled, the slave continues to
receive. If arbitration was lost during the address
transfer stage, communication to the device may be in
progress. If addressed, an ACK pulse will be
generated. If arbitration was lost during the data
transfer stage, the device will need to re-transfer the
data at a later time.
Refer to Application Note AN578, “Use of the SSP
Module in the I2C Multi-Master Environment”
(DS00578) for more information.
相關(guān)PDF資料
PDF描述
ATTINY15L-1SU IC MCU AVR 1K FLASH 1.6MHZ 8SOIC
ATTINY2313-20SUR IC MCU AVR 2K FLASH 20SOIC
ATTINY2313A-MMHR IC MCU AVR 2K FLASH 3X3 20QFN
ATTINY26-16MQR IC MCU AVR 2K 16MHZ IND 32QFN
ATTINY26L-8PU IC MCU AVR 2K 5V 8MHZ 20-DIP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ATTINY13V-W-11 功能描述:8位微控制器 -MCU Microcontroller 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
ATTINY13-W 功能描述:8位微控制器 -MCU Microcontroller 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
ATTINY13-W-11 功能描述:8位微控制器 -MCU Microcontroller 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
ATTINY15 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-BIT AVR㈢ Microcontroller with 1K Byte Flash
ATTINY15(PDIP) 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*