參數(shù)資料
型號(hào)： LH7A404N0F092B3
廠商： NXP Semiconductors N.V.
元件分類(lèi)： 數(shù)學(xué)處理器
英文描述： 32-Bit System-on-Chip
封裝： LH7A404N0F000B3<SOT1021-1 (LFBGA324)|<<http://www.nxp.com/packages/SOT1021-1.html<1<Always Pb-free,;LH7A404N0F092B3<SOT1021-1 (LFBGA324)|<<http://www.nxp.com/packages/SOT
文件頁(yè)數(shù)： 67/75頁(yè)
文件大?。?/td> 1109K
代理商： LH7A404N0F092B3
32-Bit System-on-Chip
LH7A404
Preliminary data sheet
67
NXP Semiconductors
Reference Oscillator Circuit Design
Figure 52 and Figure 53 show a reference oscillator
design for both the 32.768 kHz and 14.7456 MHz clocks.
Low Operating Temperatures and
Noise Immunity
The junction temperature, Tj, is the operating tem-
perature of the transistors in the integrated circuit. The
switching speed of the CMOS circuitry within the SoC
depends partly on Tj, and the lower the operating tem-
perature, the faster the CMOS circuits will switch.
Increased switching noise generated by faster switch-
ing circuits could affect the overall system stability. The
amount of switching noise is directly affected by the
application executed on the SoC.
NXP suggests that users implementing a system to
meet the full
40
°C to +85°C specification use an exter-
nal oscillator rather than a crystal to drive the system
clock input of the System-on-Chip. This change from
crystal to oscillator will increase the robustness (ie,
noise immunity of the clock input to the SoC).
Figure 52. 32.768 kHz External Oscillator Components and Schematic
ENABLE
XTALIN
XTALOUT
GND
NOTES:
1. Y1 is a parallel-resonant type crystal. (See table)
2. The nominal values for C1 and C2 shown are for
a crystal specified at 12.5 pF load capacitance (CL).
3. The values for C1 and C2 are dependent upon
the cystal's specified load capacitance and PCB
stray capacitance.
4. R1 must be in the circuit.
5. Ground connections should be short and return
to the ground plane which is connected to the
processor's core ground pins.
6. Tolerance for R1, C1, C2 is
≤
5%.
GND
32.768 kHz
18 M
LH7A404-168
PARAMETER
DESCRIPTION
32.768 kHz Crystal
Tolerance
Aging
Load Capacitance
ESR (MAX.)
Drive Level
Reference crystal
Parallel Mode
±30 ppm
±3 ppm
12.5 pF
50 k
1.0 μW (MAX.)
MTRON SX1555 or equivalent
C1
15 pF
C2
18 pF
R1
Y1
INTERNAL TO
THE LH7A404
EXTERNAL TO
THE LH7A404
REFERENCE CRYSTAL SPECIFICATIONS
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參數(shù)描述
LH7A404N0F092B3,55 功能描述:ARM微控制器 - MCU LCD,USB FS/HOST,MMU,ADC,BGA324 RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:72 MHz 程序存儲(chǔ)器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT
LH7A404N0F092B3,551 制造商:NXP Semiconductors 功能描述:LH7A404 Series 3.6 V 266 MHZ Surface Mount 32-Bit System-on-Chip
LH7A404N0F092B3;55 功能描述:ARM微控制器 - MCU LCD USB FS/HOST MMU RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:72 MHz 程序存儲(chǔ)器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT
LH7A404N0F092B3-S 功能描述:ARM微控制器 - MCU ARM9 LCD USB HOST RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:72 MHz 程序存儲(chǔ)器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT
LH7A405 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Microcontroller
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