AT89LP428 Atmel Corporation, AT89LP428 Datasheet - Page 130

• Manufacturer Part Number: AT89LP428
• Manufacturer: Atmel Corporation

Specifications of AT89LP428

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 25 MHz
• Cpu: 8051-1C
• Max I/o Pins: 30
• Spi: 1
• Uart: 1
• Sram (kbytes): 0.75
• Eeprom (bytes): 512
• Self Program Memory: IAP
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 3
• Isp: SPI/OCD
• Watchdog: Yes

24.3.3
130
AT89LP428/828
Crystal Oscillator
Figure 24-5. Quartz Crystal Input at 5V
Figure 24-6. Ceramic Resonator Input at 5V
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
0
0
Oscillator Amplitude vs. Frequency
Oscillator Amplitude vs. Frequency
Ceramic Resonator with R1 = 4MΩ
5
5
Quartz Crystal with R1 = 4MΩ
Frequency (MHz)
Frequency (MHz)
10
10
15
15
20
20
25
25
C2=10pF
C2=5pF
C2=0pF
C2=10pF
C2=5pF
C2=0pF
3654A–MICRO–8/09