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参数资料
型号： ST10F269Z2Q3
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP144
封装： 28 X 28 MM, PLASTIC, QFP-144
文件页数： 10/160页
文件大小： 1541K
代理商： ST10F269Z2Q3
ST10F269
107/160
18 - SYSTEM RESET
System reset initializes the MCU in a predefined state. There are five ways to activate a reset state. The
system start-up configuration is different for each case as shown in Table 28.
Table 28 : Reset Event Definition
18.1 - Long Hardware Reset
The reset is triggered when RSTIN pin is pulled low, then the MCU is immediately forced in reset default
state. It pulls low RSTOUT pin, it cancels pending internal hold states if any, it aborts external bus cycle, it
switches buses (data, address and control signals) and I/O pin drivers to high-impedance, it pulls high PORT0
pins and the reset sequence starts.
To get a long hardware reset, the duration of the external RSTIN signal must be longer than 1040 TCL.
The level of RPD pin is sampled during the whole RSTIN pulse duration. A low level on RPD pin
determines an asynchronous reset while a high level leads to a synchronous reset.
Note
A reset can be entered as synchronous and exit as asynchronous if VRPD voltage drops below the
RPD pin threshold (typically 2.5V for VDD = 5V) when RSTIN pin is low or when RSTIN pin is
internally pulled low.
18.1.1 - Asynchronous Reset
Figure 54 and Figure 55 show asynchronous reset condition (RPD pin is at low level).
Figure 54 : Asynchronous Reset Sequence External Fetch
Note: 1) RSTIN rising edge to internal latch of PORT0 is 3 CPU clock cycles (6 TCL) if the PLL is bypassed and the prescaler is on
(fCPU =fXTAL / 2), else it is 4 CPU clock cycles (8 TCL).
Reset Source
Short-cut
Conditions
Power-on reset
PONR
Power-on
Long Hardware reset (synchronous & asynchronous)
LHWR
t RSTIN > 1040 TCL
Short Hardware reset (synchronous reset)
SHWR
4 TCL < t RSTIN < 1038 TCL
Watchdog Timer reset
WDTR
WDT overflow
Software reset
SWR
SRST execution
6 or 8 TCL
1)
CPU Clock
RSTIN
Asynchronous
Reset Condition
RPD
RSTOUT
ALE
PORT0
Reset Configuration
1st Instruction External Fetch
Latching point of PORT0
for system start-up
configuration
8
12
34
6
7
59
RD
EXTERNAL FETCH
Internal reset
5 TCL
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相关代理商/技术参数
参数描述
ST10F269Z2Q6 功能描述:16位微控制器 - MCU 256K Flash 12K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
ST10F269Z2Q6/TR 功能描述:16位微控制器 - MCU 16B MCU 256K Byte and 12K Byte RAM RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
ST10F269Z2QX 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:16-BIT MCU WITH MAC UNIT, 256K BYTE FLASH MEMORY AND 12K BYTE RAM
ST10F269Z2T3 功能描述:16位微控制器 - MCU ST10F272 16B MCU RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
ST10F269Z2T6 功能描述:16位微控制器 - MCU ST10F272 16B MCU RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
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