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参数资料
型号： ST72F60E1M1
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, PDSO24
封装： 0.300 INCH, LEAD FREE, PLASTIC, SOP-24
文件页数： 70/139页
文件大小： 1993K
代理商： ST72F60E1M1
I/O ports
ST7260xx
36/139
10
I/O ports
10.1
Introduction
The I/O ports offer different functional modes:
●
Transfer of data through digital inputs and outputs and for specific pins
●
Alternate signal input/output for the on-chip peripherals
●
External interrupt generation
An I/O port consists of up to 8 pins. Each pin can be programmed independently as a digital
input (with or without interrupt generation) or a digital output.
10.2
Functional description
Each port is associated to 2 main registers:
●
Data register (DR)
●
Data direction register (DDR)
Each I/O pin may be programmed using the corresponding register bits in DDR register: bit
X corresponding to pin X of the port. The same correspondence is used for the DR register.
Input modes
The input configuration is selected by clearing the corresponding DDR register bit.
In this case, reading the DR register returns the digital value applied to the external I/O pin.
Note:
1
All the inputs are triggered by a Schmitt trigger.
2
When switching from input mode to output mode, the DR register should be written first to
output the correct value as soon as the port is configured as an output.
Interrupt function
When an I/O is configured as an Input with Interrupt, an event on this I/O can generate an
external Interrupt request to the CPU. The interrupt sensitivity is given independently
according to the description mentioned in the ITRFRE interrupt register.
Each pin can independently generate an Interrupt request.
Each external interrupt vector is linked to a dedicated group of I/O port pins (see Interrupts
section). If more than one input pin is selected simultaneously as an interrupt source, this is
logically ORed. For this reason if one of the interrupt pins is tied low, the other ones are
masked.
Output mode
The pin is configured in output mode by setting the corresponding DDR register bit (see
Table 13).
Table 13.
I/O pin functions
DDR
Mode
0
Input
1
Output
相关PDF资料
PDF描述
ST72F60K2DIE1 8-BIT, MROM, 8 MHz, MICROCONTROLLER, UUC
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相关代理商/技术参数
参数描述
ST72F60E2M1 功能描述:8位微控制器 -MCU ST7262 Lo Spd USB 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
ST72F60K1U1 功能描述:8位微控制器 -MCU 8 BITS MICROCONTR 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
ST72F60K1U1TR 功能描述:8位微控制器 -MCU ST7262 Lo Spd USB 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
ST72F60K2B1 功能描述:8位微控制器 -MCU 8 BITS MICROCONTR 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
ST72F60K2U1TR 功能描述:8位微控制器 -MCU ST7262 Lo Spd USB 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
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