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参数资料
型号： MC9S12C64MPB25
厂商： FREESCALE SEMICONDUCTOR INC
元件分类： 微控制器/微处理器
英文描述： 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP52
封装： LQFP-52
文件页数： 15/138页
文件大小： 2318K
代理商： MC9S12C64MPB25
Device User Guide — 9S12C128DGV1/D V01.07
109
B.6 Reset, Oscillator and PLL
This section summarizes the electrical characteristics of the various startup scenarios for Oscillator and
Phase-Locked-Loop (PLL).
B.6.1 Startup
Table B-10 summarizes several startup characteristics explained in this section. Detailed description of the
startup behavior can be found in the Clock and Reset Generator (CRG) Block User Guide.
B.6.1.1 POR
The release level VPORR and the assert level VPORA are derived from the VDD Supply. They are also valid
if the device is powered externally. After releasing the POR reset the oscillator and the clock quality check
are started. If after a time tCQOUT no valid oscillation is detected, the MCU will start using the internal self
clock. The fastest startup time possible is given by nuposc.
B.6.1.2 LVR
The release level VLVRR and the assert level VLVRA are derived from the VDD Supply. They are also valid
if the device is powered externally. After releasing the LVR reset the oscillator and the clock quality check
are started. If after a time tCQOUT no valid oscillation is detected, the MCU will start using the internal self
clock. The fastest startup time possible is given by nuposc.
B.6.1.3 SRAM Data Retention
Provided an appropriate external reset signal is applied to the MCU, preventing the CPU from executing
code when VDD5 is out of specification limits, the SRAM contents integrity is guaranteed if after the reset
the PORF bit in the CRG Flags Register has not been set.
Table B-10 Startup Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num
C
Rating
Symbol
Min
Typ
Max
Unit
1
T
POR release level
VPORR
2.07
V
2
T
POR assert level
VPORA
0.97
V
3
D
Reset input pulse width, minimum input time
PWRSTL
2
tosc
4
D
Startup from Reset
nRST
192
196
nosc
5D
Interrupt pulse width, IRQ edge-sensitive
mode
PWIRQ
20
ns
6
D
Wait recovery startup time
tWRS
14
tcyc
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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MC9S12C64VFAE 功能描述:16位微控制器 - MCU 9S12C64 (KOI) 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
MC9S12C64VFUE 功能描述:16位微控制器 - MCU 9S12C64 (KOI) 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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