saa-xc866 Infineon Technologies Corporation, saa-xc866 Datasheet - Page 58

• Manufacturer Part Number: saa-xc866
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Infineon Technologies Corporation

Figure 22
The second type of reset in SAA-XC866 is the hardware reset. This reset function can
be used during normal operation or when the chip is in power-down mode. A reset input
pin RESET is provided for the hardware reset. To ensure the recognition of the hardware
reset, pin RESET must be held low for at least 100 ns.
The Watchdog Timer (WDT) module is also capable of resetting the device if it detects
a malfunction in the system.
Another type of reset that needs to be detected is a reset while the device is in
power-down mode (wake-up reset). While the contents of the static RAM are undefined
after a power-on reset, they are well defined after a wake-up reset from power-down
mode.
Data Sheet
0.9*VDDC
Voltage
Voltage
< 0.4V
2.5V
2.3V
5V
5V
0V
V
DDP,
V
DDC
typ. < 50 u s
and V
RESET
during Power-on Reset
54
Functional Description
SAA-XC866
RESET with
VDDC
V1.2, 2008-02
VDDP
capacitor
Time
Time