ATAM510X-ILQY ATMEL [ATMEL Corporation], ATAM510X-ILQY Datasheet - Page 14

• Manufacturer Part Number: ATAM510X-ILQY
• Description: MARC4 4-bit MTP Universal Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

2.6.4
Figure 2-8.
14
ATAM510
Watchdog Reset
NRST
Device
status
Port
status
Pull-up/
configuration
pull-down
Normal Mode Start-up
Program defined
Table 2-3.
Note:
The watchdog’s function can be enabled via a mask option and triggers a reset with every
watchdog counter overflow. To suppress the watchdog reset, the counter must be regularly
reset by reading the watchdog register address (CWD). The CPU reacts in exactly the same
manner as a reset stimulus from any of the above sources.
Old config.
NO_RST
RST2
RST3
RST4
RST5
RST6
RST7
If this option is used, the reset is not maskable and will also trigger if the predefined code is written
on to Port A by the CPU itself. Care should also be taken not to generate an unwanted reset by
inadvertently passing through the reset code on input transitions. This applies especially if the
pins have a high capacitive load.
No pull-up/-down
Input mode
Multiple Key Reset Options
Reset
Not used (default)
BPA0 and BPA1 = low
BPA0 and BPA1 and BPA2 = low
BPA0 and BPA1 and BPA2 and BPA3 = low
BPA0 and BPA1 = high
BPA0 and BPA1 and BPA2 = high
BPA0 and BPA1 and BPA2 and BPA3 = high
Configuration period
No pull-up/-down
Input mode
250 ms
New configuration
Power-on reset delay
Input mode
80 ms
Application program
execution
New configuration
Program defined
4711B–4BMCU–01/05