Megawin Technology Co., Ltd.
MG87FE/L52
Pin Status in IDLE Mode and POWER-DOWN Mode
Mode
Idle
Program Memory
Internal
ALE
1
PSEN
Port0
Data
Float
Data
Float
Port1
Data
Data
Data
Data
Port2
Data
Port3
Data
Data
Data
Data
1
1
0
0
Idle
External
1
Address
Data
Power-Down
Power-Down
Internal
0
External
0
Data
9.3 Power-On Flag (POF)
The register bit in PCON.4 is set only by power-on action. System RESET from Watch-Dog
timer, software RESET and RESET pin can not set POF. It only can be cleared by firmware.
28
Preliminary ver 1.3
Date: 2009-JAN-20