AT89C51ID2-SMSIM ATMEL [ATMEL Corporation], AT89C51ID2-SMSIM Datasheet - Page 33

• Manufacturer Part Number: AT89C51ID2-SMSIM
• Description: 8-bit Flash Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

Reset Output
4289A–8051–09/03
As detailed in Section “Hardware Watchdog Timer”, page 108, the WDT generates a 96-
clock period pulse on the RST pin. In order to properly propagate this pulse to the rest of
the application in case of external capacitor or power-supply supervisor circuit, a 1 k
resistor must be added as shown Figure 10.
Figure 10. Recommended Reset Output Schematic
VDD
VDD
VSS
+
RST
1K
RST
AT89C51ID2
AT89C51ID2
To other
on-board
circuitry
33