GMS30004 Datasheet, PDF (132/158 Pages) Hynix Semiconductor – 4-BIT SINGLE CHIP MICROCOMPUTERS

ê Appendix D Magic- b
1. Function
1) Stand-by
Outputted of D0~D3 is ÌLÌ
Oscillation is stop
Output of D0~D4 is held to ÌHÌ
2) Condition of stand-by mode
After reset
When scan strobe output is over, there is not any key input.
3) Release of stand-by mode
One of the key scan input (K0~K3, R0~R3) is change to ÌLÌ level
D-2