GMS81C2020 Datasheet, PDF (19/92 Pages) Hynix Semiconductor – CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver

Hyundai Micro Electronics
• R00 / INT0, R01 / INT1, R02 / EC0
Data Bus
Data Register
Funcin_sel
Data Bus
Data Bus
Funcin
[INT0, INT1, EC0]
• R03 / BUZO
Data Bus
Direction Register
Read
Funcout
[BUZO]
Data Register
Funcout_sel
1
0
Data Bus
Data Bus
Direction Register
Read
• R04 ~ R07, R10 ~ R17, R20 ~ R27, R30 ~ R35
Data Bus
Data Bus
Data Bus
Data Register
Direction Register
Read
GMS81C2020/GMS81C2120
V_DD
Vdisp
[Metal Option]
V_DD
Vdisp
[Metal Option]
V_DD
Vdisp
[Metal Option]
Nov. 1999 Ver 0.0
preliminary
19