IS89C51 Datasheet, PDF (35/48 Pages) Integrated Silicon Solution, Inc – CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 4-Kbytes of FLASH

IS89C51
XTAL2
XTAL1
ISSI ^®
R
C1
C2
Figure 23. Oscillator Connections for High Speed (> 24 MHz)
Note:
When the frequency is higher than 24 MHz, please refer to Table 11 for recommended values of C1, C2, and R.
Table 11. Recommended Value for C1, C2, R
Frequency Range
3.5 MHz - 24 MHz
30 MHz - 40 MHz
C1
20 pF-30 pF
3 pF-10 pF
C2
20 pF-30 pF
3 pF-10 pF
R
Not Apply
6.2K-10K
Integrated Silicon Solution, Inc. — 1-800-379-4774
35
MC016-1C
11/21/98