Samsung S3C8275X - Manual (Page 317)

S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X S3F8275X/F8278X/F8274X FLASH MCU
19-7
2 MHz
6.25 kHz (main)/8.2 kHz(sub)
2 4
Supply Voltage (V)
Instruction Clock = 1/4n x oscillator frequency (n = 1, 2, 8, 16)
1.05 MHz
Instruction Clock
8 MHz
4.2 MHz
fx (Main/Sub oscillation frequency)
2.5 3.6
400 kHz(main)/32.8 kHz(sub)
3 1
Figure 19-3. Operating Voltage Range