参数资料
型号: ST72C314J4T1XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44
封装: TQFP-44
文件页数: 22/153页
文件大小: 2235K
代理商: ST72C314J4T1XXX
ST72334J/N, ST72314J/N, ST72124J
118/153
CLOCK AND TIMING CHARACTERISTICS (Cont’d)
16.5.3.2 Typical Ceramic Resonators
Note:
tSU(OSC) is the typical oscillator start-up time measured between VDD=2.8V and the fetch of the first instruction (with a
quick VDD ramp-up from 0 to 5V (<50s).
Figure 69. Application with Ceramic Resonator
Notes:
1. Resonator characteristics given by the ceramic resonator manufacturer.
2. tSU(OSC) is the typical oscillator start-up time measured between VDD=2.8V and the fetch of the first instruction (with a
quick VDD ramp-up from 0 to 5V (<50s).
3. The oscillator selection can be optimized in terms of supply current using an high quality resonator with small RS value.
Refer to Table 22 and Table 23 and to the ceramic resonator manufacturer’s documentation for more details.
Symbol
Parameter
Conditions
Typ
Unit
tSU(osc)
Ceramic resonator start-up time
LP
2MHz
4.2
ms
MP
4MHz
2.1
MS
8MHz
1.1
HS
16MHz
0.7
OSC2
OSC1
fOSC
CL1
CL2
i2
RF
ST72XXX
RESONATOR
WHEN RESONATOR WITH
INTEGRATED CAPACITORS
RD
RF(EXT)
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