參數(shù)資料
型號(hào): MC9S12E64MPV
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: MC9S12E-Family Device User Guide V01.04
中文描述: 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
封裝: LQFP-112
文件頁(yè)數(shù): 121/156頁(yè)
文件大小: 3077K
代理商: MC9S12E64MPV
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121
B.4 Reset, Oscillator and PLL
This section summarizes the electrical characteristics of the various startup scenarios for Oscillator and
Phase-Locked-Loop (PLL).
B.4.1 Startup
Table B-2
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.4.1.1 POR
The release level V
PORR
and the assert level V
PORA
are derived from the V
DD
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 t
CQOUT
no valid oscillation is detected, the MCU will start using the internal self
clock. The fastest startup time possible is given by n
uposc
.
B.4.1.2 LVR
The release level V
LVRR
and the assert level V
LVRA
are derived from the V
DD
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 t
CQOUT
no valid oscillation is detected, the MCU will start using the internal self
clock. The fastest startup time possible is given by n
uposc
.
B.4.1.3 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-2 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
V
PORR
2.07
V
2
T
POR assert level
V
PORA
0.97
V
3
D
Reset input pulse width, minimum input time
PW
RSTL
2
t
osc
4
D
Startup from Reset
n
RST
192
196
n
osc
5
D
Interrupt pulse width, IRQ edge-sensitive mode
PW
IRQ
20
ns
6
D
Wait recovery startup time
t
WRS
14
t
cyc
7
P
LVR release level
V
LVRR
2.25
V
8
P
LVR assert level
V
LVRA
2.55
V
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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MC9S12E64MPVE 功能描述:16位微控制器 - MCU MORAY EEL RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
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