ST6210CD3/SWD 查看數據表（PDF） - STMicroelectronics

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ST6210CD3/SWD

8-BIT MCUs WITH A/D CONVERTER, TWO TIMERS, OSCILLATOR SAFEGUARD & SAFE RESET

STMicroelectronics 

ST6208C/ST6209C/ST6210C/ST6220C

CLOCK AND TIMING CHARACTERISTICS (Cont’d)

11.5.4 RC Oscillator

The ST6 internal clock can be supplied with an ex-

ternal RC oscillator.

Symbol

Parameter

Conditio ns

Min Typ Max Unit

fOSC

RC oscillator frequency 1)

RNET

RC Oscillator external resistor 2)

RNET=22KΩ

7.2

RNET=47KΩ

5.1

RNET=100KΩ

3.2

RNET=220KΩ

1.8

RNET=470KΩ

0.9

RNET=22KΩ

3.7

RNET=47KΩ

2.8

RNET=100KΩ

1.8

RNET=220KΩ

1

RNET=470KΩ

0.5

see Figure 52 & Figure 53 22

8.6

5.7

3.4

1.9

0.95

4.3

3

1.9

1.1

0.55

10

6.5

3.8

2

1.1

MHz

4.9

3.3

2

1.2

0.6

870 KΩ

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

EXTERNAL RC

OSCOUT

RNET

OSCIN

NC

fOSC

VDD

VDD

VDD

CURRENT COPY

74/105

1

CEX~9pF DISCHARGE

ST62XX

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