STM32L152RCY7 데이터 시트보기 (PDF) - STMicroelectronics

부품명

상세내역

제조사

STM32L152RCY7

Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 256KB Flash, 32KB SRAM, 8KB EEPROM, LCD, USB, ADC, DAC

STMicroelectronics 

Electrical characteristics

STM32L151xC STM32L152xC

4.

3t2SU.7(L6S8Ek) Hiszthoescsiltlaarttiuopn

time measured from the

is reached. This value is

moment it is enabled (by

measured for a standard

software) to a stabilized

crystal resonator and it can

vary

significantly with the crystal manufacturer.

Note:

Caution:

For CL1 and CL2, it is recommended to use high-quality ceramic capacitors in the 5 pF to

15 pF range selected to match the requirements of the crystal or resonator (see Figure 18).

CL1 and CL2, are usually the same size. The crystal manufacturer typically specifies a load

capacitance which is the series combination of CL1 and CL2.

Load capacitance CL has the following formula: CL = CL1 x CL2 / (CL1 + CL2) + Cstray where

Cstray is the pin capacitance and board or trace PCB-related capacitance. Typically, it is

between 2 pF and 7 pF.

To avoid exceeding the maximum value of CL1 and CL2 (15 pF) it is strongly recommended

to use a resonator with a load capacitance CL ≤7 pF. Never use a resonator with a load

capacitance of 12.5 pF.

Example: if the user chooses a resonator with a load capacitance of CL = 6 pF and Cstray =

2 pF, then CL1 = CL2 = 8 pF.

Figure 18. Typical application with a 32.768 kHz crystal

5HVRQDWRUZLWK

LQWHJUDWHGFDSDFLWRUV

&/

26&B,1

N+ ]

UHVRQDWRU

5)

26&B28 7

&/

%LDV

FRQWUROOHG

JDLQ

I/6(

670/[[

DLE

76/136

DocID022799 Rev 13

Share Link: