參數(shù)資料
型號： ST72C254G2M3
英文描述： 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY. ADC. 16-BIT TIMERS. SPI.
中文描述： 8位單電壓閃存微控制器。 ADC的。 16位定時器。的SPI。
文件頁數(shù)： 116/140頁
文件大?。?/td> 1349K
代理商： ST72C254G2M3
ST72104G, ST72215G, ST72216G, ST72254G
77/140
I2C BUS INTERFACE (Cont’d)
Master Transmitter
Following the address transmission and after SR1
register has been read, the master sends bytes
from the DR register to the SDA line via the inter-
nal shift register.
The master waits for a read of the SR1 register fol-
lowed by a write in the DR register, holding the
SCL line low (see Figure 45 Transfer sequencing
EV8).
When the acknowledge bit is received, the
interface sets:
– EVF and BTF bits with an interrupt if the ITE bit
is set.
To close the communication: after writing the last
byte to the DR register, set the STOP bit to gener-
ate the Stop condition. The interface goes auto-
matically back to slave mode (M/SL bit cleared).
Error Cases
– BERR: Detection of a Stop or a Start condition
during a byte transfer. In this case, the EVF and
BERR bits are set by hardware with an interrupt
if ITE is set.
– AF: Detection of a non-acknowledge bit. In this
case, the EVF and AF bits are set by hardware
with an interrupt if the ITE bit is set. To resume,
set the START or STOP bit.
– ARLO: Detection of an arbitration lost condition.
In this case the ARLO bit is set by hardware (with
an interrupt if the ITE bit is set and the interface
goes automatically back to slave mode (the M/SL
bit is cleared).
Note: In all these cases, the SCL line is not held
low; however, the SDA line can remain low due to
possible 0 bits transmitted last. It is then neces-
sary to release both lines by software.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST72C254G2M3/TR 功能描述:8位微控制器 -MCU 8B MCU SINGLE VLTG FLASH MEMORY 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 安裝風格:SMD/SMT
ST72C254G2M6 功能描述:8位微控制器 -MCU Flash 8K SPI/I2C 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 安裝風格:SMD/SMT
ST72C254G2M6 制造商:STMicroelectronics 功能描述:8BIT MCU FLASH 8K 72C254 SOIC28
ST72C254G2M6/TR 制造商:ST 功能描述:0
ST72C254G2M6E 制造商:STMicroelectronics 功能描述:8K S028 LEADFREE - Rail/Tube
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