参数资料
型号: ST62T15CB3/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP28
封装: 0.600 INCH, PLASTIC, DIP-28
文件页数: 79/105页
文件大小: 1003K
代理商: ST62T15CB3/XXX
ST6215C/ST6225C
75/105
CLOCK AND TIMING CHARACTERISTICS (Cont’d)
11.5.4 RC Oscillator
The ST6 internal clock can be supplied with an external RC oscillator. Depending on the RNET value, the
accuracy of the frequency is about 20%, so it may not be suitable for some applications.
Notes:
1. Data based on characterization results, not tested in production. These measurements were done with the OSCin pin
unconnected (only soldered on the PCB).
2. RNET must have a positive temperature coefficient (ppm/°C), carbon resistors should therefore not be used.
Figure 51. Typical Application with RC Oscillator
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fOSC
RC oscillator frequency 1)
4.5
V
≤V
DD
≤6.
0V
RNET=22 k
RNET=47 k
RNET=100 k
RNET=220 k
RNET=470 k
7.2
5.1
3.2
1.8
0.9
8.6
5.7
3.4
1.9
0.95
10
6.5
3.8
2
1.1
MHz
3V
≤V
DD
≤3.6V
RNET=22 k
RNET=47 k
RNET=100 k
RNET=220 k
RNET=470 k
3.7
2.8
1.8
1
0.5
4.3
3
1.9
1.1
0.55
4.9
3.3
2
1.2
0.6
RNET
RC Oscillator external resistor 2)
see Figure 52 & Figure 53
22
870
k
OSCIN
OSCOUT
RNET
EXTERNAL RC
CEX~9pF DISCHARGE
ST62XX
VDD
fOSC
VDD
NC
MIRROR
CURRENT
1
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