参数资料
型号: ST72C334N4B3XXX
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, PDIP56
封装: 0.600 INCH, PLASTIC, SDIP-56
文件页数: 91/153页
文件大小: 2235K
代理商: ST72C334N4B3XXX
ST72334J/N, ST72314J/N, ST72124J
42/153
I/O PORTS (Cont’d)
CAUTION: The alternate function must not be ac-
tivated as long as the pin is configured as input
with interrupt, in order to avoid generating spurious
interrupts.
Analog alternate function
When the pin is used as an ADC input, the I/O
must be configured as floating input. The analog
multiplexer (controlled by the ADC registers)
switches the analog voltage present on the select-
ed pin to the common analog rail which is connect-
ed to the ADC input.
It is recommended not to change the voltage level
or loading on any port pin while conversion is in
progress. Furthermore it is recommended not to
have clocking pins located close to a selected an-
alog pin.
WARNING: The analog input voltage level must
be within the limits stated in the absolute maxi-
mum ratings.
12.3 I/O PORT IMPLEMENTATION
The hardware implementation on each I/O port de-
pends on the settings in the DDR and OR registers
and specific feature of the I/O port such as ADC In-
put or true open drain.
Switching these I/O ports from one state to anoth-
er should be done in a sequence that prevents un-
wanted side effects. Recommended safe transi-
tions are illustrated in Figure 27 Other transitions
are potentially risky and should be avoided, since
they are likely to present unwanted side-effects
such as spurious interrupt generation.
Figure 27. Interrupt I/O Port State Transitions
The I/O port register configurations are summa-
rized as follows.
Standard Ports
PA5:4, PC7:0, PD7:0, PE7:4, PE1:0, PF7:6, PF4
Interrupt Ports
PA2:0, PB7:5, PB2:0, PF1:0 (with pull-up)
PA3, PB4, PB3, PF2 (without pull-up)
True Open Drain Ports
PA7:6
01
floating/pull-up
interrupt
INPUT
00
floating
(reset state)
INPUT
10
open-drain
OUTPUT
11
push-pull
OUTPUT
XX
= DDR, OR
MODE
DDR
OR
floating input
0
pull-up input
0
1
open drain output
1
0
push-pull output
1
MODE
DDR
OR
floating input
0
pull-up interrupt input
0
1
open drain output
1
0
push-pull output
1
MODE
DDR
OR
floating input
0
floating interrupt input
0
1
open drain output
1
0
push-pull output
1
MODE
DDR
floating input
0
open drain (high sink ports)
1
相关PDF资料
PDF描述
ST72321BAR6T7/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72321BR6T7/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72321BAR7TC/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72321BJ6T3/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
ST72321BJ6T6/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
相关代理商/技术参数
参数描述
ST72C334N4B6 功能描述:8位微控制器 -MCU Flash 16K SPI/SCI 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
ST72C334N4T3 功能描述:8位微控制器 -MCU Flash 16K SPI/SCI 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
ST72C334N4T6 功能描述:8位微控制器 -MCU Flash 16K SPI/SCI 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
ST72C334N4T6TR 制造商:STMicroelectronics 功能描述:MCU 8BIT ST7 CISC 16KB FLASH 3.3V/5V 64TQFP - Tape and Reel
ST72C8F64-A05AS 制造商:STEC Inc 功能描述:512MB,ECC,UB,PC3200 - Bulk