收藏本站
参数资料
型号： ST72C254G1M6
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO28
封装： 0.300 INCH, PLASTIC, SOIC-28
文件页数： 65/136页
文件大小： 929K
代理商： ST72C254G1M6
ST72104G, ST72215G, ST72216G, ST72254G
34/136
11 MISCELLANEOUS REGISTERS
The miscellaneous registers allow control over
several different features such as the external in-
terrupts or the I/O alternate functions.
11.1 I/O PORT INTERRUPT SENSITIVITY
The external interrupt sensitivity is controlled by
the ISxx bits of the Miscellaneous register and the
OPTION BYTE. This control allows having two ful-
ly independent external interrupt source sensitivi-
ties with configurable sources (using EXTIT option
bit) as shown in Figure 23 and Figure 24.
Each external interrupt source can be generated
on four different events on the pin:
s
Falling edge
s
Rising edge
s
Falling and rising edge
s
Falling edge and low level
To guarantee correct functionality, the sensitivity
bits in the MISCR1 register must be modified only
when the I bit of the CC register is set to 1 (inter-
rupt masked). See I/O port register and Miscella-
neous register descriptions for more details on the
programming.
11.2 I/O PORT ALTERNATE FUNCTIONS
The MISCR registers manage four I/O port miscel-
laneous alternate functions:
s
Main clock signal (fCPU) output on PC2
s
SPI pin configuration:
– SS pin internal control to use the PB7 I/O port
function while the SPI is active.
– Master output capability on MOSI pin (PB4)
deactivated while the SPI is active.
– Slave output capability on MISO pin (PB5) de-
activated while the SPI is active.
These functions are described in detail in the Sec-
tion 11.3 ”MISCELLANEOUS REGISTER DE-
SCRIPTION” on page 35.
Figure 23. Ext. Interrupt Sensitivity (EXTIT=0)
Figure 24. Ext. Interrupt Sensitivity (EXTIT=1)
ei0
INTERR UPT
SOURCE
IS00
IS01
MISCR1
SENSITI VITY
CONTROL
PA7
PA0
PC5
PC0
PB7
PB0
IS10
IS11
MISCR1
SENSITI VITY
CONTROL
ei1
INTERR UPT
SOURCE
PA7
PA0
IS00
IS01
MISCR1
SENSI TIVITY
CONTROL
ei0
INTER RUPT
SOURCE
ei1
INTER RUPT
SOURCE
IS10
IS11
MISCR1
SENSI TIVITY
CONTROL
PB7
PB0
PC5
PC0
相关PDF资料
PDF描述
ST72C254G2M3 8-BIT, FLASH, 6 MHz, MICROCONTROLLER, PDSO28
ST72C254G2M7 8-BIT, FLASH, 6 MHz, MICROCONTROLLER, PDSO28
ST72C254G2M1 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO28
ST72C254G1B1 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
ST72C254G1B7 8-BIT, FLASH, 6 MHz, MICROCONTROLLER, PDIP32
相关代理商/技术参数
参数描述
ST72C254G2B1 制造商:STMicroelectronics 功能描述:8-BIT MICROCONTROLLER - Bulk
ST72C254G2B6 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 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST72C254G2B6 制造商:STMicroelectronics 功能描述:8BIT MCU FLASH 8K 72C254 DIP32
ST72C254G2M3 功能描述:8位微控制器 -MCU ST72104G ST72215G ST72254G 8B MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
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 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*