GMS81C50 Datasheet, PDF (16/99 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCONTROLLERS

HYUNDAI
6.3 R1 Ports (R15, R16, R17)
Pin Name
R15 / T2
R16 / T1
R17 / T0
Open drain Selection
Pull-up Selection
Function Selection
from R15...T2
from R16...T1
from R17...T0
Data Register
Direction Register
Circuit Type
MUX
Data Bus
MUX
Rd
GMS81C50 Series
VDD
VDD
@ RESET
PAD
Hi - Z
or
High-Input
(with pullup)
VSS
6.4 R2, R3, R4 Ports
Pin Name
R20 ~ R27
R30 ~ R37
R40
Open drain Selection
Pull-up Selection
Data Register
Circuit Type
Direction Register
Data Bus
Rd

MUX
@ RESET
VDD
VDD
Hi - Z
or
PAD
High-Input
(with pullup)
VSS
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