System support devices include three watchdog timers: one in the processor to provide an internal interrupt
at the first timer expiration, then a hardware reset at the second; a second, external timer that resets the entire board at the first expiration; and a third that resides in the NVRAM with a free running counter programmed by the user.
In addition, the new MCU features a DTC (data transfer controller) that can be activated by internal interrupt
or by software, a watch dog timer and a 10 bit, 16 channel A/D converter.
Therefore, a special register is provided which switches the internal interrupt
vectors to the highest sector of the lower bank, thus allowing Interrupt Services during write/erase procedures.
On-chip features will include: 64 Kbytes of flash memory (contains SCP software); 24 Kbytes of RAM; five 16-bit timers; a 15-bit watchdog timer; three external and 20 internal interrupts
with seven levels; three-channels of serial I/O (UART); and a voltage down converter which will reduce the internal operating voltage to 2.