MEGA128CAN Datasheet, PDF (48/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

Figure 23. Reset Logic
DATA BUS
MCU Status
Register (MCUSR)
Power-on Reset
Circuit
BODLEVEL [2..0]
Pull-up Resistor
Spike
Filter
Brown-out
Reset Circuit
JTAG Reset
Register
Watchdog
Oscillator
Clock
CK
Generator
CKSEL[3:0]
SUT[1:0]
Delay Counters
TIMEOUT
Table 19. Reset Characteristics
Symbol Parameter
Condition
Min. Typ. Max. Units
V_POT
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)⁽¹⁾
1.4
2.3
V
1.3
2.3
V
V_RST
t_RST
RESET Pin Threshold Voltage
0.2 V_CC
0.85 V_CC V
Minimum pulse width on RESET Pin
Vcc = 5 V, temperature = 25 °C
400
ns
Notes: 1. The Power-on Reset will not work unless the supply voltage has been below V_POT
(falling)
48 AT90CAN128
4250E–CAN–12/04