STP - Stop Processor
Stop the Processor until Reset
STP will stop the processors oscillator input, shutting down the processor until a reset occurs by pulling the RES pin low.
As power consumption is a function of frequency in CMOS circuits, stopping the clock cuts power to almost nothing.
Flags Affected
| None. |
Instructions
| Syntax | Opcode | Available on: | # of | # of | Addressing Mode | ||
|---|---|---|---|---|---|---|---|
| (hex) | 6502 | 65C02 | 65816 | bytes | cycles | ||
| STP | DB | x | 1 | 31 | Implied | ||
Notes:
- Uses 3 cycles to shut down the processor. Additional cycles required by reset to restart it
Last modified November 5, 2021: Add instruction categories (6b74ff9)