mg84fl54b Megawin Technology, mg84fl54b Datasheet - Page 41

• Manufacturer Part Number: mg84fl54b
• Description: Full-speed Usb Micro-controller
• Manufacturer: Megawin Technology

15. Wake-up from Power-down Mode
When the CPU is put into power-down mode, the external interrupts (/INT0, /INT1, INT2 and INT3), keypad
interrupt and USB interrupt will wake up the CPU if any of them is enabled.
15.1. Power-down Wake-up Sources
The following figure shows the power-down wake-up sources.
Once the CPU is wakened up, the interrupt service routine is serviced until the “RETI” instruction is encountered,
and, the next instruction to be executed will be the one following the instruction that put the CPU into power-
down mode.
MEGAWIN
EKBI
EUSB
KBIF
USBI
EX0
EX1
EX2
EX3
IE0
IE1
IE2
IE3
MG84FL54B Data sheet
EA
Wake up CPU
41