參數(shù)資料
型號: ST72T631K2M0
廠商: 意法半導(dǎo)體
英文描述: LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C
中文描述: 低速USB 8高達16K的內(nèi)存位微控制器系列,高達512字節(jié)RAM,8位ADC,水分散粒劑,定時器,SCI
文件頁數(shù): 74/109頁
文件大?。?/td> 857K
代理商: ST72T631K2M0
ST7263
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I2C BUS INTERFACE
(Cont’d)
The Acknowledge function may be enabled and
disabled by software.
The I2C interface address and/or general call ad-
dress can be selected by software.
The speed of the I2C interface may be selected be-
tween Standard (0-100 kHz) and Fast I2C (100-
400 kHz).
SDA/SCL Line Control
Transmitter mode: the interface holds the clock
line low before transmission to wait for the micro-
controller to write the byte in the Data Register.
Receiver mode: the interface holds the clock line
low after reception to wait for the microcontroller to
read the byte in the Data Register.
The SCL frequency (F
SCL
) is controlled by a pro-
grammable clock divider which depends on the I2C
bus mode.
When the I2C cell is enabled, the SDA and SCL
ports must be configured as floating open-drain
output or floating input. In this case, the value of
the external pull-up resistor used depends on the
application.
When the I2C cell is disabled, the SDA and SCL
ports revert to being standard I/O port pins.
Figure 39.
I2C Interface Block Diagram
DATA REGISTER (DR)
DATA SHIFT REGISTER
COMPARATOR
OWN ADDRESS REGISTER (OAR)
CLOCK CONTROL REGISTER (CCR)
STATUS REGISTER 1 (SR1)
CONTROL REGISTER (CR)
SDAI
SCLI
CONTROL LOGIC
STATUS REGISTER 2 (SR2)
INTERRUPT
CLOCK CONTROL
DATA CONTROL
SCL
SDA
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